20896980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{367}}^1$

素因数の和:465

約数の個数: 96

約数和(自身を含む): 64049664

約数和(自身を除く): 43152684

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 73, 78, 130, 146, 156, 195, 219, 260, 292, 365, 367, 390, 438, 730, 734, 780, 876, 949, 1095, 1101, 1460, 1468, 1835, 1898, 2190, 2202, 2847, 3670, 3796, 4380, 4404, 4745, 4771, 5505, 5694, 7340, 9490, 9542, 11010, 11388, 14235, 14313, 18980, 19084, 22020, 23855, 26791, 28470, 28626, 47710, 53582, 56940, 57252, 71565, 80373, 95420, 107164, 133955, 143130, 160746, 267910, 286260, 321492, 348283, 401865, 535820, 696566, 803730, 1044849, 1393132, 1607460, 1741415, 2089698, 3482830, 4179396, 5224245, 6965660, 10448490, 20896980]

約数ペア:

[(1, 20896980), (2, 10448490), (3, 6965660), (4, 5224245), (5, 4179396), (6, 3482830), (10, 2089698), (12, 1741415), (13, 1607460), (15, 1393132), (20, 1044849), (26, 803730), (30, 696566), (39, 535820), (52, 401865), (60, 348283), (65, 321492), (73, 286260), (78, 267910), (130, 160746), (146, 143130), (156, 133955), (195, 107164), (219, 95420), (260, 80373), (292, 71565), (365, 57252), (367, 56940), (390, 53582), (438, 47710), (730, 28626), (734, 28470), (780, 26791), (876, 23855), (949, 22020), (1095, 19084), (1101, 18980), (1460, 14313), (1468, 14235), (1835, 11388), (1898, 11010), (2190, 9542), (2202, 9490), (2847, 7340), (3670, 5694), (3796, 5505), (4380, 4771), (4404, 4745)]