21889240

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8971}}^1$

素因数の和:9043

約数の個数: 32

約数和(自身を含む): 50063760

約数和(自身を除く): 28174520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8971, 17942, 35884, 44855, 71768, 89710, 179420, 358840, 547231, 1094462, 2188924, 2736155, 4377848, 5472310, 10944620, 21889240]

約数ペア:

[(1, 21889240), (2, 10944620), (4, 5472310), (5, 4377848), (8, 2736155), (10, 2188924), (20, 1094462), (40, 547231), (61, 358840), (122, 179420), (244, 89710), (305, 71768), (488, 44855), (610, 35884), (1220, 17942), (2440, 8971)]