21671140

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{223}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 47190528

約数和(自身を除く): 25519388

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 113, 172, 215, 223, 226, 430, 446, 452, 565, 860, 892, 1115, 1130, 2230, 2260, 4460, 4859, 9589, 9718, 19178, 19436, 24295, 25199, 38356, 47945, 48590, 50398, 95890, 97180, 100796, 125995, 191780, 251990, 503980, 1083557, 2167114, 4334228, 5417785, 10835570, 21671140]

約数ペア:

[(1, 21671140), (2, 10835570), (4, 5417785), (5, 4334228), (10, 2167114), (20, 1083557), (43, 503980), (86, 251990), (113, 191780), (172, 125995), (215, 100796), (223, 97180), (226, 95890), (430, 50398), (446, 48590), (452, 47945), (565, 38356), (860, 25199), (892, 24295), (1115, 19436), (1130, 19178), (2230, 9718), (2260, 9589), (4460, 4859)]