20442640

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8243}}^1$

素因数の和:8287

約数の個数: 40

約数和(自身を含む): 49068288

約数和(自身を除く): 28625648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8243, 16486, 32972, 41215, 65944, 82430, 131888, 164860, 255533, 329720, 511066, 659440, 1022132, 1277665, 2044264, 2555330, 4088528, 5110660, 10221320, 20442640]

約数ペア:

[(1, 20442640), (2, 10221320), (4, 5110660), (5, 4088528), (8, 2555330), (10, 2044264), (16, 1277665), (20, 1022132), (31, 659440), (40, 511066), (62, 329720), (80, 255533), (124, 164860), (155, 131888), (248, 82430), (310, 65944), (496, 41215), (620, 32972), (1240, 16486), (2480, 8243)]