64894840

素因数分解:

$2^3\times 5^1\times {\mathrm{641}}^1\times {\mathrm{2531}}^1$

素因数の和:3183

約数の個数: 32

約数和(自身を含む): 146298960

約数和(自身を除く): 81404120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 641, 1282, 2531, 2564, 3205, 5062, 5128, 6410, 10124, 12655, 12820, 20248, 25310, 25640, 50620, 101240, 1622371, 3244742, 6489484, 8111855, 12978968, 16223710, 32447420, 64894840]

約数ペア:

[(1, 64894840), (2, 32447420), (4, 16223710), (5, 12978968), (8, 8111855), (10, 6489484), (20, 3244742), (40, 1622371), (641, 101240), (1282, 50620), (2531, 25640), (2564, 25310), (3205, 20248), (5062, 12820), (5128, 12655), (6410, 10124)]