21529720

素因数分解:

$2^3\times 5^1\times {\mathrm{631}}^1\times {\mathrm{853}}^1$

素因数の和:1495

約数の個数: 32

約数和(自身を含む): 48575520

約数和(自身を除く): 27045800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 631, 853, 1262, 1706, 2524, 3155, 3412, 4265, 5048, 6310, 6824, 8530, 12620, 17060, 25240, 34120, 538243, 1076486, 2152972, 2691215, 4305944, 5382430, 10764860, 21529720]

約数ペア:

[(1, 21529720), (2, 10764860), (4, 5382430), (5, 4305944), (8, 2691215), (10, 2152972), (20, 1076486), (40, 538243), (631, 34120), (853, 25240), (1262, 17060), (1706, 12620), (2524, 8530), (3155, 6824), (3412, 6310), (4265, 5048)]