25811960

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{15739}}^1$

素因数の和:15791

約数の個数: 32

約数和(自身を含む): 59497200

約数和(自身を除く): 33685240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 15739, 31478, 62956, 78695, 125912, 157390, 314780, 629560, 645299, 1290598, 2581196, 3226495, 5162392, 6452990, 12905980, 25811960]

約数ペア:

[(1, 25811960), (2, 12905980), (4, 6452990), (5, 5162392), (8, 3226495), (10, 2581196), (20, 1290598), (40, 645299), (41, 629560), (82, 314780), (164, 157390), (205, 125912), (328, 78695), (410, 62956), (820, 31478), (1640, 15739)]