20355140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{991}}^1$

素因数の和:1092

約数の個数: 48

約数和(自身を含む): 46663680

約数和(自身を除く): 26308540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 991, 1027, 1580, 1982, 2054, 3964, 4108, 4955, 5135, 9910, 10270, 12883, 19820, 20540, 25766, 51532, 64415, 78289, 128830, 156578, 257660, 313156, 391445, 782890, 1017757, 1565780, 2035514, 4071028, 5088785, 10177570, 20355140]

約数ペア:

[(1, 20355140), (2, 10177570), (4, 5088785), (5, 4071028), (10, 2035514), (13, 1565780), (20, 1017757), (26, 782890), (52, 391445), (65, 313156), (79, 257660), (130, 156578), (158, 128830), (260, 78289), (316, 64415), (395, 51532), (790, 25766), (991, 20540), (1027, 19820), (1580, 12883), (1982, 10270), (2054, 9910), (3964, 5135), (4108, 4955)]