21229840

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13967}}^1$

素因数の和:13999

約数の個数: 40

約数和(自身を含む): 51960960

約数和(自身を除く): 30731120

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13967, 27934, 55868, 69835, 111736, 139670, 223472, 265373, 279340, 530746, 558680, 1061492, 1117360, 1326865, 2122984, 2653730, 4245968, 5307460, 10614920, 21229840]

約数ペア:

[(1, 21229840), (2, 10614920), (4, 5307460), (5, 4245968), (8, 2653730), (10, 2122984), (16, 1326865), (19, 1117360), (20, 1061492), (38, 558680), (40, 530746), (76, 279340), (80, 265373), (95, 223472), (152, 139670), (190, 111736), (304, 69835), (380, 55868), (760, 27934), (1520, 13967)]