64912840

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{39581}}^1$

素因数の和:39633

約数の個数: 32

約数和(自身を含む): 149619960

約数和(自身を除く): 84707120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 39581, 79162, 158324, 197905, 316648, 395810, 791620, 1583240, 1622821, 3245642, 6491284, 8114105, 12982568, 16228210, 32456420, 64912840]

約数ペア:

[(1, 64912840), (2, 32456420), (4, 16228210), (5, 12982568), (8, 8114105), (10, 6491284), (20, 3245642), (40, 1622821), (41, 1583240), (82, 791620), (164, 395810), (205, 316648), (328, 197905), (410, 158324), (820, 79162), (1640, 39581)]