21580408

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{167}}^1\times {\mathrm{557}}^1$

素因数の和:759

約数の個数: 32

約数和(自身を含む): 42184800

約数和(自身を除く): 20604392

約数列:

[1, 2, 4, 8, 29, 58, 116, 167, 232, 334, 557, 668, 1114, 1336, 2228, 4456, 4843, 9686, 16153, 19372, 32306, 38744, 64612, 93019, 129224, 186038, 372076, 744152, 2697551, 5395102, 10790204, 21580408]

約数ペア:

[(1, 21580408), (2, 10790204), (4, 5395102), (8, 2697551), (29, 744152), (58, 372076), (116, 186038), (167, 129224), (232, 93019), (334, 64612), (557, 38744), (668, 32306), (1114, 19372), (1336, 16153), (2228, 9686), (4456, 4843)]