21213680

素因数分解:

$2^4\times 5^1\times {\mathrm{283}}^1\times {\mathrm{937}}^1$

素因数の和:1233

約数の個数: 40

約数和(自身を含む): 49548912

約数和(自身を除く): 28335232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 283, 566, 937, 1132, 1415, 1874, 2264, 2830, 3748, 4528, 4685, 5660, 7496, 9370, 11320, 14992, 18740, 22640, 37480, 74960, 265171, 530342, 1060684, 1325855, 2121368, 2651710, 4242736, 5303420, 10606840, 21213680]

約数ペア:

[(1, 21213680), (2, 10606840), (4, 5303420), (5, 4242736), (8, 2651710), (10, 2121368), (16, 1325855), (20, 1060684), (40, 530342), (80, 265171), (283, 74960), (566, 37480), (937, 22640), (1132, 18740), (1415, 14992), (1874, 11320), (2264, 9370), (2830, 7496), (3748, 5660), (4528, 4685)]