221071280

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{38921}}^1$

素因数の和:39005

約数の個数: 40

約数和(自身を含む): 521243424

約数和(自身を除く): 300172144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 5680, 38921, 77842, 155684, 194605, 311368, 389210, 622736, 778420, 1556840, 2763391, 3113680, 5526782, 11053564, 13816955, 22107128, 27633910, 44214256, 55267820, 110535640, 221071280]

約数ペア:

[(1, 221071280), (2, 110535640), (4, 55267820), (5, 44214256), (8, 27633910), (10, 22107128), (16, 13816955), (20, 11053564), (40, 5526782), (71, 3113680), (80, 2763391), (142, 1556840), (284, 778420), (355, 622736), (568, 389210), (710, 311368), (1136, 194605), (1420, 155684), (2840, 77842), (5680, 38921)]