20417840

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8233}}^1$

素因数の和:8277

約数の個数: 40

約数和(自身を含む): 49008768

約数和(自身を除く): 28590928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8233, 16466, 32932, 41165, 65864, 82330, 131728, 164660, 255223, 329320, 510446, 658640, 1020892, 1276115, 2041784, 2552230, 4083568, 5104460, 10208920, 20417840]

約数ペア:

[(1, 20417840), (2, 10208920), (4, 5104460), (5, 4083568), (8, 2552230), (10, 2041784), (16, 1276115), (20, 1020892), (31, 658640), (40, 510446), (62, 329320), (80, 255223), (124, 164660), (155, 131728), (248, 82330), (310, 65864), (496, 41165), (620, 32932), (1240, 16466), (2480, 8233)]