641420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2467}}^1$

素因数の和:2489

約数の個数: 24

約数和(自身を含む): 1451184

約数和(自身を除く): 809764

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 2467, 4934, 9868, 12335, 24670, 32071, 49340, 64142, 128284, 160355, 320710, 641420]

約数ペア:

[(1, 641420), (2, 320710), (4, 160355), (5, 128284), (10, 64142), (13, 49340), (20, 32071), (26, 24670), (52, 12335), (65, 9868), (130, 4934), (260, 2467)]