20964840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{151}}^1$

素因数の和:267

約数の個数: 128

約数和(自身を含む): 68947200

約数和(自身を除く): 47982360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 89, 104, 120, 130, 151, 156, 178, 195, 260, 267, 302, 312, 356, 390, 445, 453, 520, 534, 604, 712, 755, 780, 890, 906, 1068, 1157, 1208, 1335, 1510, 1560, 1780, 1812, 1963, 2136, 2265, 2314, 2670, 3020, 3471, 3560, 3624, 3926, 4530, 4628, 5340, 5785, 5889, 6040, 6942, 7852, 9060, 9256, 9815, 10680, 11570, 11778, 13439, 13884, 15704, 17355, 18120, 19630, 23140, 23556, 26878, 27768, 29445, 34710, 39260, 40317, 46280, 47112, 53756, 58890, 67195, 69420, 78520, 80634, 107512, 117780, 134390, 138840, 161268, 174707, 201585, 235560, 268780, 322536, 349414, 403170, 524121, 537560, 698828, 806340, 873535, 1048242, 1397656, 1612680, 1747070, 2096484, 2620605, 3494140, 4192968, 5241210, 6988280, 10482420, 20964840]

約数ペア:

[(1, 20964840), (2, 10482420), (3, 6988280), (4, 5241210), (5, 4192968), (6, 3494140), (8, 2620605), (10, 2096484), (12, 1747070), (13, 1612680), (15, 1397656), (20, 1048242), (24, 873535), (26, 806340), (30, 698828), (39, 537560), (40, 524121), (52, 403170), (60, 349414), (65, 322536), (78, 268780), (89, 235560), (104, 201585), (120, 174707), (130, 161268), (151, 138840), (156, 134390), (178, 117780), (195, 107512), (260, 80634), (267, 78520), (302, 69420), (312, 67195), (356, 58890), (390, 53756), (445, 47112), (453, 46280), (520, 40317), (534, 39260), (604, 34710), (712, 29445), (755, 27768), (780, 26878), (890, 23556), (906, 23140), (1068, 19630), (1157, 18120), (1208, 17355), (1335, 15704), (1510, 13884), (1560, 13439), (1780, 11778), (1812, 11570), (1963, 10680), (2136, 9815), (2265, 9256), (2314, 9060), (2670, 7852), (3020, 6942), (3471, 6040), (3560, 5889), (3624, 5785), (3926, 5340), (4530, 4628)]