1981529375

素因数分解:

$5^4\times 7^2\times {\mathrm{89}}^1\times {\mathrm{727}}^1$

素因数の和:850

約数の個数: 60

約数和(自身を含む): 2916753840

約数和(自身を除く): 935224465

約数列:

[1, 5, 7, 25, 35, 49, 89, 125, 175, 245, 445, 623, 625, 727, 875, 1225, 2225, 3115, 3635, 4361, 4375, 5089, 6125, 11125, 15575, 18175, 21805, 25445, 30625, 35623, 55625, 64703, 77875, 90875, 109025, 127225, 178115, 323515, 389375, 452921, 454375, 545125, 636125, 890575, 1617575, 2264605, 2725625, 3170447, 3180625, 4452875, 8087875, 11323025, 15852235, 22264375, 40439375, 56615125, 79261175, 283075625, 396305875, 1981529375]

約数ペア:

[(1, 1981529375), (5, 396305875), (7, 283075625), (25, 79261175), (35, 56615125), (49, 40439375), (89, 22264375), (125, 15852235), (175, 11323025), (245, 8087875), (445, 4452875), (623, 3180625), (625, 3170447), (727, 2725625), (875, 2264605), (1225, 1617575), (2225, 890575), (3115, 636125), (3635, 545125), (4361, 454375), (4375, 452921), (5089, 389375), (6125, 323515), (11125, 178115), (15575, 127225), (18175, 109025), (21805, 90875), (25445, 77875), (30625, 64703), (35623, 55625)]