20493460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{149}}^1$

素因数の和:217

約数の個数: 72

約数和(自身を含む): 48774600

約数和(自身を除く): 28281140

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 46, 52, 65, 92, 115, 130, 149, 230, 260, 298, 299, 460, 529, 596, 598, 745, 1058, 1196, 1490, 1495, 1937, 2116, 2645, 2980, 2990, 3427, 3874, 5290, 5980, 6854, 6877, 7748, 9685, 10580, 13708, 13754, 17135, 19370, 27508, 34270, 34385, 38740, 44551, 68540, 68770, 78821, 89102, 137540, 157642, 178204, 222755, 315284, 394105, 445510, 788210, 891020, 1024673, 1576420, 2049346, 4098692, 5123365, 10246730, 20493460]

約数ペア:

[(1, 20493460), (2, 10246730), (4, 5123365), (5, 4098692), (10, 2049346), (13, 1576420), (20, 1024673), (23, 891020), (26, 788210), (46, 445510), (52, 394105), (65, 315284), (92, 222755), (115, 178204), (130, 157642), (149, 137540), (230, 89102), (260, 78821), (298, 68770), (299, 68540), (460, 44551), (529, 38740), (596, 34385), (598, 34270), (745, 27508), (1058, 19370), (1196, 17135), (1490, 13754), (1495, 13708), (1937, 10580), (2116, 9685), (2645, 7748), (2980, 6877), (2990, 6854), (3427, 5980), (3874, 5290)]