77640880

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{23671}}^1$

素因数の和:23725

約数の個数: 40

約数和(自身を含む): 184925664

約数和(自身を除く): 107284784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 23671, 47342, 94684, 118355, 189368, 236710, 378736, 473420, 946840, 970511, 1893680, 1941022, 3882044, 4852555, 7764088, 9705110, 15528176, 19410220, 38820440, 77640880]

約数ペア:

[(1, 77640880), (2, 38820440), (4, 19410220), (5, 15528176), (8, 9705110), (10, 7764088), (16, 4852555), (20, 3882044), (40, 1941022), (41, 1893680), (80, 970511), (82, 946840), (164, 473420), (205, 378736), (328, 236710), (410, 189368), (656, 118355), (820, 94684), (1640, 47342), (3280, 23671)]