21697660

素因数分解:

$2^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{6271}}^1$

素因数の和:6453

約数の個数: 24

約数和(自身を含む): 45835776

約数和(自身を除く): 24138116

約数列:

[1, 2, 4, 5, 10, 20, 173, 346, 692, 865, 1730, 3460, 6271, 12542, 25084, 31355, 62710, 125420, 1084883, 2169766, 4339532, 5424415, 10848830, 21697660]

約数ペア:

[(1, 21697660), (2, 10848830), (4, 5424415), (5, 4339532), (10, 2169766), (20, 1084883), (173, 125420), (346, 62710), (692, 31355), (865, 25084), (1730, 12542), (3460, 6271)]