208996840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{401917}}^1$

素因数の和:401941

約数の個数: 32

約数和(自身を含む): 506416680

約数和(自身を除く): 297419840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 401917, 803834, 1607668, 2009585, 3215336, 4019170, 5224921, 8038340, 10449842, 16076680, 20899684, 26124605, 41799368, 52249210, 104498420, 208996840]

約数ペア:

[(1, 208996840), (2, 104498420), (4, 52249210), (5, 41799368), (8, 26124605), (10, 20899684), (13, 16076680), (20, 10449842), (26, 8038340), (40, 5224921), (52, 4019170), (65, 3215336), (104, 2009585), (130, 1607668), (260, 803834), (520, 401917)]