81006640

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:207

約数の個数: 160

約数和(自身を含む): 226610496

約数和(自身を除く): 145603856

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 40, 44, 52, 55, 65, 73, 80, 88, 97, 104, 110, 130, 143, 146, 176, 194, 208, 220, 260, 286, 292, 365, 388, 440, 485, 520, 572, 584, 715, 730, 776, 803, 880, 949, 970, 1040, 1067, 1144, 1168, 1261, 1430, 1460, 1552, 1606, 1898, 1940, 2134, 2288, 2522, 2860, 2920, 3212, 3796, 3880, 4015, 4268, 4745, 5044, 5335, 5720, 5840, 6305, 6424, 7081, 7592, 7760, 8030, 8536, 9490, 10088, 10439, 10670, 11440, 12610, 12848, 13871, 14162, 15184, 16060, 17072, 18980, 20176, 20878, 21340, 25220, 27742, 28324, 32120, 35405, 37960, 41756, 42680, 50440, 52195, 55484, 56648, 64240, 69355, 70810, 75920, 77891, 83512, 85360, 92053, 100880, 104390, 110968, 113296, 138710, 141620, 155782, 167024, 184106, 208780, 221936, 277420, 283240, 311564, 368212, 389455, 417560, 460265, 554840, 566480, 623128, 736424, 778910, 835120, 920530, 1012583, 1109680, 1246256, 1472848, 1557820, 1841060, 2025166, 3115640, 3682120, 4050332, 5062915, 6231280, 7364240, 8100664, 10125830, 16201328, 20251660, 40503320, 81006640]

約数ペア:

[(1, 81006640), (2, 40503320), (4, 20251660), (5, 16201328), (8, 10125830), (10, 8100664), (11, 7364240), (13, 6231280), (16, 5062915), (20, 4050332), (22, 3682120), (26, 3115640), (40, 2025166), (44, 1841060), (52, 1557820), (55, 1472848), (65, 1246256), (73, 1109680), (80, 1012583), (88, 920530), (97, 835120), (104, 778910), (110, 736424), (130, 623128), (143, 566480), (146, 554840), (176, 460265), (194, 417560), (208, 389455), (220, 368212), (260, 311564), (286, 283240), (292, 277420), (365, 221936), (388, 208780), (440, 184106), (485, 167024), (520, 155782), (572, 141620), (584, 138710), (715, 113296), (730, 110968), (776, 104390), (803, 100880), (880, 92053), (949, 85360), (970, 83512), (1040, 77891), (1067, 75920), (1144, 70810), (1168, 69355), (1261, 64240), (1430, 56648), (1460, 55484), (1552, 52195), (1606, 50440), (1898, 42680), (1940, 41756), (2134, 37960), (2288, 35405), (2522, 32120), (2860, 28324), (2920, 27742), (3212, 25220), (3796, 21340), (3880, 20878), (4015, 20176), (4268, 18980), (4745, 17072), (5044, 16060), (5335, 15184), (5720, 14162), (5840, 13871), (6305, 12848), (6424, 12610), (7081, 11440), (7592, 10670), (7760, 10439), (8030, 10088), (8536, 9490)]