20513480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{383}}^1$

素因数の和:510

約数の個数: 64

約数和(自身を含む): 50319360

約数和(自身を除く): 29805880

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 103, 104, 130, 206, 260, 383, 412, 515, 520, 766, 824, 1030, 1339, 1532, 1915, 2060, 2678, 3064, 3830, 4120, 4979, 5356, 6695, 7660, 9958, 10712, 13390, 15320, 19916, 24895, 26780, 39449, 39832, 49790, 53560, 78898, 99580, 157796, 197245, 199160, 315592, 394490, 512837, 788980, 1025674, 1577960, 2051348, 2564185, 4102696, 5128370, 10256740, 20513480]

約数ペア:

[(1, 20513480), (2, 10256740), (4, 5128370), (5, 4102696), (8, 2564185), (10, 2051348), (13, 1577960), (20, 1025674), (26, 788980), (40, 512837), (52, 394490), (65, 315592), (103, 199160), (104, 197245), (130, 157796), (206, 99580), (260, 78898), (383, 53560), (412, 49790), (515, 39832), (520, 39449), (766, 26780), (824, 24895), (1030, 19916), (1339, 15320), (1532, 13390), (1915, 10712), (2060, 9958), (2678, 7660), (3064, 6695), (3830, 5356), (4120, 4979)]