20855640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{461}}^1$

素因数の和:517

約数の個数: 128

約数和(自身を含む): 69854400

約数和(自身を除く): 48998760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 29, 30, 39, 40, 52, 58, 60, 65, 78, 87, 104, 116, 120, 130, 145, 156, 174, 195, 232, 260, 290, 312, 348, 377, 390, 435, 461, 520, 580, 696, 754, 780, 870, 922, 1131, 1160, 1383, 1508, 1560, 1740, 1844, 1885, 2262, 2305, 2766, 3016, 3480, 3688, 3770, 4524, 4610, 5532, 5655, 5993, 6915, 7540, 9048, 9220, 11064, 11310, 11986, 13369, 13830, 15080, 17979, 18440, 22620, 23972, 26738, 27660, 29965, 35958, 40107, 45240, 47944, 53476, 55320, 59930, 66845, 71916, 80214, 89895, 106952, 119860, 133690, 143832, 160428, 173797, 179790, 200535, 239720, 267380, 320856, 347594, 359580, 401070, 521391, 534760, 695188, 719160, 802140, 868985, 1042782, 1390376, 1604280, 1737970, 2085564, 2606955, 3475940, 4171128, 5213910, 6951880, 10427820, 20855640]

約数ペア:

[(1, 20855640), (2, 10427820), (3, 6951880), (4, 5213910), (5, 4171128), (6, 3475940), (8, 2606955), (10, 2085564), (12, 1737970), (13, 1604280), (15, 1390376), (20, 1042782), (24, 868985), (26, 802140), (29, 719160), (30, 695188), (39, 534760), (40, 521391), (52, 401070), (58, 359580), (60, 347594), (65, 320856), (78, 267380), (87, 239720), (104, 200535), (116, 179790), (120, 173797), (130, 160428), (145, 143832), (156, 133690), (174, 119860), (195, 106952), (232, 89895), (260, 80214), (290, 71916), (312, 66845), (348, 59930), (377, 55320), (390, 53476), (435, 47944), (461, 45240), (520, 40107), (580, 35958), (696, 29965), (754, 27660), (780, 26738), (870, 23972), (922, 22620), (1131, 18440), (1160, 17979), (1383, 15080), (1508, 13830), (1560, 13369), (1740, 11986), (1844, 11310), (1885, 11064), (2262, 9220), (2305, 9048), (2766, 7540), (3016, 6915), (3480, 5993), (3688, 5655), (3770, 5532), (4524, 4610)]