128413640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{78301}}^1$

素因数の和:78353

約数の個数: 32

約数和(自身を含む): 295981560

約数和(自身を除く): 167567920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 78301, 156602, 313204, 391505, 626408, 783010, 1566020, 3132040, 3210341, 6420682, 12841364, 16051705, 25682728, 32103410, 64206820, 128413640]

約数ペア:

[(1, 128413640), (2, 64206820), (4, 32103410), (5, 25682728), (8, 16051705), (10, 12841364), (20, 6420682), (40, 3210341), (41, 3132040), (82, 1566020), (164, 783010), (205, 626408), (328, 391505), (410, 313204), (820, 156602), (1640, 78301)]