21510040

素因数分解:

$2^3\times 5^1\times {\mathrm{181}}^1\times {\mathrm{2971}}^1$

素因数の和:3163

約数の個数: 32

約数和(自身を含む): 48681360

約数和(自身を除く): 27171320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 181, 362, 724, 905, 1448, 1810, 2971, 3620, 5942, 7240, 11884, 14855, 23768, 29710, 59420, 118840, 537751, 1075502, 2151004, 2688755, 4302008, 5377510, 10755020, 21510040]

約数ペア:

[(1, 21510040), (2, 10755020), (4, 5377510), (5, 4302008), (8, 2688755), (10, 2151004), (20, 1075502), (40, 537751), (181, 118840), (362, 59420), (724, 29710), (905, 23768), (1448, 14855), (1810, 11884), (2971, 7240), (3620, 5942)]