20557420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4651}}^1$

素因数の和:4690

約数の個数: 48

約数和(自身を含む): 49236768

約数和(自身を除く): 28679348

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4651, 9302, 18604, 23255, 46510, 60463, 79067, 93020, 120926, 158134, 241852, 302315, 316268, 395335, 604630, 790670, 1027871, 1209260, 1581340, 2055742, 4111484, 5139355, 10278710, 20557420]

約数ペア:

[(1, 20557420), (2, 10278710), (4, 5139355), (5, 4111484), (10, 2055742), (13, 1581340), (17, 1209260), (20, 1027871), (26, 790670), (34, 604630), (52, 395335), (65, 316268), (68, 302315), (85, 241852), (130, 158134), (170, 120926), (221, 93020), (260, 79067), (340, 60463), (442, 46510), (884, 23255), (1105, 18604), (2210, 9302), (4420, 4651)]