21000655160

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^2\times {\mathrm{1454339}}^1$

素因数の和:1454388

約数の個数: 48

約数和(自身を含む): 49869318600

約数和(自身を除く): 28868663440

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 361, 380, 722, 760, 1444, 1805, 2888, 3610, 7220, 14440, 1454339, 2908678, 5817356, 7271695, 11634712, 14543390, 27632441, 29086780, 55264882, 58173560, 110529764, 138162205, 221059528, 276324410, 525016379, 552648820, 1050032758, 1105297640, 2100065516, 2625081895, 4200131032, 5250163790, 10500327580, 21000655160]

約数ペア:

[(1, 21000655160), (2, 10500327580), (4, 5250163790), (5, 4200131032), (8, 2625081895), (10, 2100065516), (19, 1105297640), (20, 1050032758), (38, 552648820), (40, 525016379), (76, 276324410), (95, 221059528), (152, 138162205), (190, 110529764), (361, 58173560), (380, 55264882), (722, 29086780), (760, 27632441), (1444, 14543390), (1805, 11634712), (2888, 7271695), (3610, 5817356), (7220, 2908678), (14440, 1454339)]