21348280

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7517}}^1$

素因数の和:7599

約数の個数: 32

約数和(自身を含む): 48716640

約数和(自身を除く): 27368360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7517, 15034, 30068, 37585, 60136, 75170, 150340, 300680, 533707, 1067414, 2134828, 2668535, 4269656, 5337070, 10674140, 21348280]

約数ペア:

[(1, 21348280), (2, 10674140), (4, 5337070), (5, 4269656), (8, 2668535), (10, 2134828), (20, 1067414), (40, 533707), (71, 300680), (142, 150340), (284, 75170), (355, 60136), (568, 37585), (710, 30068), (1420, 15034), (2840, 7517)]