21508048

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{421}}^1$

素因数の和:563

約数の個数: 40

約数和(自身を含む): 43536896

約数和(自身を除く): 22028848

約数列:

[1, 2, 4, 8, 16, 31, 62, 103, 124, 206, 248, 412, 421, 496, 824, 842, 1648, 1684, 3193, 3368, 6386, 6736, 12772, 13051, 25544, 26102, 43363, 51088, 52204, 86726, 104408, 173452, 208816, 346904, 693808, 1344253, 2688506, 5377012, 10754024, 21508048]

約数ペア:

[(1, 21508048), (2, 10754024), (4, 5377012), (8, 2688506), (16, 1344253), (31, 693808), (62, 346904), (103, 208816), (124, 173452), (206, 104408), (248, 86726), (412, 52204), (421, 51088), (496, 43363), (824, 26102), (842, 25544), (1648, 13051), (1684, 12772), (3193, 6736), (3368, 6386)]