21990760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:139

約数の個数: 128

約数和(自身を含む): 58786560

約数和(自身を除く): 36795800

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 23, 40, 41, 44, 46, 53, 55, 82, 88, 92, 106, 110, 115, 164, 184, 205, 212, 220, 230, 253, 265, 328, 410, 424, 440, 451, 460, 506, 530, 583, 820, 902, 920, 943, 1012, 1060, 1166, 1219, 1265, 1640, 1804, 1886, 2024, 2120, 2173, 2255, 2332, 2438, 2530, 2915, 3608, 3772, 4346, 4510, 4664, 4715, 4876, 5060, 5830, 6095, 7544, 8692, 9020, 9430, 9752, 10120, 10373, 10865, 11660, 12190, 13409, 17384, 18040, 18860, 20746, 21730, 23320, 23903, 24380, 26818, 37720, 41492, 43460, 47806, 48760, 49979, 51865, 53636, 67045, 82984, 86920, 95612, 99958, 103730, 107272, 119515, 134090, 191224, 199916, 207460, 239030, 249895, 268180, 399832, 414920, 478060, 499790, 536360, 549769, 956120, 999580, 1099538, 1999160, 2199076, 2748845, 4398152, 5497690, 10995380, 21990760]

約数ペア:

[(1, 21990760), (2, 10995380), (4, 5497690), (5, 4398152), (8, 2748845), (10, 2199076), (11, 1999160), (20, 1099538), (22, 999580), (23, 956120), (40, 549769), (41, 536360), (44, 499790), (46, 478060), (53, 414920), (55, 399832), (82, 268180), (88, 249895), (92, 239030), (106, 207460), (110, 199916), (115, 191224), (164, 134090), (184, 119515), (205, 107272), (212, 103730), (220, 99958), (230, 95612), (253, 86920), (265, 82984), (328, 67045), (410, 53636), (424, 51865), (440, 49979), (451, 48760), (460, 47806), (506, 43460), (530, 41492), (583, 37720), (820, 26818), (902, 24380), (920, 23903), (943, 23320), (1012, 21730), (1060, 20746), (1166, 18860), (1219, 18040), (1265, 17384), (1640, 13409), (1804, 12190), (1886, 11660), (2024, 10865), (2120, 10373), (2173, 10120), (2255, 9752), (2332, 9430), (2438, 9020), (2530, 8692), (2915, 7544), (3608, 6095), (3772, 5830), (4346, 5060), (4510, 4876), (4664, 4715)]