19991896

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{577}}^1$

素因数の和:715

約数の個数: 32

約数和(自身を含む): 38702880

約数和(自身を除く): 18710984

約数列:

[1, 2, 4, 8, 61, 71, 122, 142, 244, 284, 488, 568, 577, 1154, 2308, 4331, 4616, 8662, 17324, 34648, 35197, 40967, 70394, 81934, 140788, 163868, 281576, 327736, 2498987, 4997974, 9995948, 19991896]

約数ペア:

[(1, 19991896), (2, 9995948), (4, 4997974), (8, 2498987), (61, 327736), (71, 281576), (122, 163868), (142, 140788), (244, 81934), (284, 70394), (488, 40967), (568, 35197), (577, 34648), (1154, 17324), (2308, 8662), (4331, 4616)]