21537808

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{173}}^1\times {\mathrm{251}}^1$

素因数の和:463

約数の個数: 40

約数和(自身を含む): 43497216

約数和(自身を除く): 21959408

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 173, 248, 251, 346, 496, 502, 692, 1004, 1384, 2008, 2768, 4016, 5363, 7781, 10726, 15562, 21452, 31124, 42904, 43423, 62248, 85808, 86846, 124496, 173692, 347384, 694768, 1346113, 2692226, 5384452, 10768904, 21537808]

約数ペア:

[(1, 21537808), (2, 10768904), (4, 5384452), (8, 2692226), (16, 1346113), (31, 694768), (62, 347384), (124, 173692), (173, 124496), (248, 86846), (251, 85808), (346, 62248), (496, 43423), (502, 42904), (692, 31124), (1004, 21452), (1384, 15562), (2008, 10726), (2768, 7781), (4016, 5363)]