407768920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{784171}}^1$

素因数の和:784195

約数の個数: 32

約数和(自身を含む): 988056720

約数和(自身を除く): 580287800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 784171, 1568342, 3136684, 3920855, 6273368, 7841710, 10194223, 15683420, 20388446, 31366840, 40776892, 50971115, 81553784, 101942230, 203884460, 407768920]

約数ペア:

[(1, 407768920), (2, 203884460), (4, 101942230), (5, 81553784), (8, 50971115), (10, 40776892), (13, 31366840), (20, 20388446), (26, 15683420), (40, 10194223), (52, 7841710), (65, 6273368), (104, 3920855), (130, 3136684), (260, 1568342), (520, 784171)]