28781680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{21163}}^1$

素因数の和:21193

約数の個数: 40

約数和(自身を含む): 70857072

約数和(自身を除く): 42075392

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 21163, 42326, 84652, 105815, 169304, 211630, 338608, 359771, 423260, 719542, 846520, 1439084, 1693040, 1798855, 2878168, 3597710, 5756336, 7195420, 14390840, 28781680]

約数ペア:

[(1, 28781680), (2, 14390840), (4, 7195420), (5, 5756336), (8, 3597710), (10, 2878168), (16, 1798855), (17, 1693040), (20, 1439084), (34, 846520), (40, 719542), (68, 423260), (80, 359771), (85, 338608), (136, 211630), (170, 169304), (272, 105815), (340, 84652), (680, 42326), (1360, 21163)]