20161978480

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{397}}^1\times {\mathrm{3943}}^1$

素因数の和:4383

約数の個数: 160

約数和(自身を含む): 56057554944

約数和(自身を除く): 35895576464

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 397, 460, 560, 644, 794, 805, 920, 1288, 1588, 1610, 1840, 1985, 2576, 2779, 3176, 3220, 3943, 3970, 5558, 6352, 6440, 7886, 7940, 9131, 11116, 12880, 13895, 15772, 15880, 18262, 19715, 22232, 27601, 27790, 31544, 31760, 36524, 39430, 44464, 45655, 55202, 55580, 63088, 63917, 73048, 78860, 90689, 91310, 110404, 111160, 127834, 138005, 146096, 157720, 181378, 182620, 220808, 222320, 255668, 276010, 315440, 319585, 362756, 365240, 441616, 453445, 511336, 552020, 634823, 639170, 725512, 730480, 906890, 1022672, 1104040, 1269646, 1278340, 1451024, 1565371, 1813780, 2208080, 2539292, 2556680, 3130742, 3174115, 3627560, 5078584, 5113360, 6261484, 6348230, 7255120, 7826855, 10157168, 10957597, 12522968, 12696460, 15653710, 21915194, 25045936, 25392920, 31307420, 36003533, 43830388, 50785840, 54787985, 62614840, 72007066, 87660776, 109575970, 125229680, 144014132, 175321552, 180017665, 219151940, 252024731, 288028264, 360035330, 438303880, 504049462, 576056528, 720070660, 876607760, 1008098924, 1260123655, 1440141320, 2016197848, 2520247310, 2880282640, 4032395696, 5040494620, 10080989240, 20161978480]

約数ペア:

[(1, 20161978480), (2, 10080989240), (4, 5040494620), (5, 4032395696), (7, 2880282640), (8, 2520247310), (10, 2016197848), (14, 1440141320), (16, 1260123655), (20, 1008098924), (23, 876607760), (28, 720070660), (35, 576056528), (40, 504049462), (46, 438303880), (56, 360035330), (70, 288028264), (80, 252024731), (92, 219151940), (112, 180017665), (115, 175321552), (140, 144014132), (161, 125229680), (184, 109575970), (230, 87660776), (280, 72007066), (322, 62614840), (368, 54787985), (397, 50785840), (460, 43830388), (560, 36003533), (644, 31307420), (794, 25392920), (805, 25045936), (920, 21915194), (1288, 15653710), (1588, 12696460), (1610, 12522968), (1840, 10957597), (1985, 10157168), (2576, 7826855), (2779, 7255120), (3176, 6348230), (3220, 6261484), (3943, 5113360), (3970, 5078584), (5558, 3627560), (6352, 3174115), (6440, 3130742), (7886, 2556680), (7940, 2539292), (9131, 2208080), (11116, 1813780), (12880, 1565371), (13895, 1451024), (15772, 1278340), (15880, 1269646), (18262, 1104040), (19715, 1022672), (22232, 906890), (27601, 730480), (27790, 725512), (31544, 639170), (31760, 634823), (36524, 552020), (39430, 511336), (44464, 453445), (45655, 441616), (55202, 365240), (55580, 362756), (63088, 319585), (63917, 315440), (73048, 276010), (78860, 255668), (90689, 222320), (91310, 220808), (110404, 182620), (111160, 181378), (127834, 157720), (138005, 146096)]