645335540

素因数分解:

$2^2\times 5^1\times {\mathrm{1669}}^1\times {\mathrm{19333}}^1$

素因数の和:21011

約数の個数: 24

約数和(自身を含む): 1356086760

約数和(自身を除く): 710751220

約数列:

[1, 2, 4, 5, 10, 20, 1669, 3338, 6676, 8345, 16690, 19333, 33380, 38666, 77332, 96665, 193330, 386660, 32266777, 64533554, 129067108, 161333885, 322667770, 645335540]

約数ペア:

[(1, 645335540), (2, 322667770), (4, 161333885), (5, 129067108), (10, 64533554), (20, 32266777), (1669, 386660), (3338, 193330), (6676, 96665), (8345, 77332), (16690, 38666), (19333, 33380)]