21085040

素因数分解:

$2^4\times 5^1\times {\mathrm{449}}^1\times {\mathrm{587}}^1$

素因数の和:1049

約数の個数: 40

約数和(自身を含む): 49215600

約数和(自身を除く): 28130560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 449, 587, 898, 1174, 1796, 2245, 2348, 2935, 3592, 4490, 4696, 5870, 7184, 8980, 9392, 11740, 17960, 23480, 35920, 46960, 263563, 527126, 1054252, 1317815, 2108504, 2635630, 4217008, 5271260, 10542520, 21085040]

約数ペア:

[(1, 21085040), (2, 10542520), (4, 5271260), (5, 4217008), (8, 2635630), (10, 2108504), (16, 1317815), (20, 1054252), (40, 527126), (80, 263563), (449, 46960), (587, 35920), (898, 23480), (1174, 17960), (1796, 11740), (2245, 9392), (2348, 8980), (2935, 7184), (3592, 5870), (4490, 4696)]