1628729720

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{457}}^1\times {\mathrm{641}}^1$

素因数の和:1248

約数の個数: 64

約数和(自身を含む): 3704853600

約数和(自身を除く): 2076123880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 457, 556, 641, 695, 914, 1112, 1282, 1390, 1828, 2285, 2564, 2780, 3205, 3656, 4570, 5128, 5560, 6410, 9140, 12820, 18280, 25640, 63523, 89099, 127046, 178198, 254092, 292937, 317615, 356396, 445495, 508184, 585874, 635230, 712792, 890990, 1171748, 1270460, 1464685, 1781980, 2343496, 2540920, 2929370, 3563960, 5858740, 11717480, 40718243, 81436486, 162872972, 203591215, 325745944, 407182430, 814364860, 1628729720]

約数ペア:

[(1, 1628729720), (2, 814364860), (4, 407182430), (5, 325745944), (8, 203591215), (10, 162872972), (20, 81436486), (40, 40718243), (139, 11717480), (278, 5858740), (457, 3563960), (556, 2929370), (641, 2540920), (695, 2343496), (914, 1781980), (1112, 1464685), (1282, 1270460), (1390, 1171748), (1828, 890990), (2285, 712792), (2564, 635230), (2780, 585874), (3205, 508184), (3656, 445495), (4570, 356396), (5128, 317615), (5560, 292937), (6410, 254092), (9140, 178198), (12820, 127046), (18280, 89099), (25640, 63523)]