642768680

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{2543}}^1$

素因数の和:2714

約数の個数: 64

約数和(自身を含む): 1483660800

約数和(自身を除く): 840892120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 89, 142, 178, 284, 355, 356, 445, 568, 710, 712, 890, 1420, 1780, 2543, 2840, 3560, 5086, 6319, 10172, 12638, 12715, 20344, 25276, 25430, 31595, 50552, 50860, 63190, 101720, 126380, 180553, 226327, 252760, 361106, 452654, 722212, 902765, 905308, 1131635, 1444424, 1805530, 1810616, 2263270, 3611060, 4526540, 7222120, 9053080, 16069217, 32138434, 64276868, 80346085, 128553736, 160692170, 321384340, 642768680]

約数ペア:

[(1, 642768680), (2, 321384340), (4, 160692170), (5, 128553736), (8, 80346085), (10, 64276868), (20, 32138434), (40, 16069217), (71, 9053080), (89, 7222120), (142, 4526540), (178, 3611060), (284, 2263270), (355, 1810616), (356, 1805530), (445, 1444424), (568, 1131635), (710, 905308), (712, 902765), (890, 722212), (1420, 452654), (1780, 361106), (2543, 252760), (2840, 226327), (3560, 180553), (5086, 126380), (6319, 101720), (10172, 63190), (12638, 50860), (12715, 50552), (20344, 31595), (25276, 25430)]