21565850

素因数分解:

$2^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{107}}^1\times {\mathrm{139}}^1$

素因数の和:287

約数の個数: 48

約数和(自身を含む): 42184800

約数和(自身を除く): 20618950

約数列:

[1, 2, 5, 10, 25, 29, 50, 58, 107, 139, 145, 214, 278, 290, 535, 695, 725, 1070, 1390, 1450, 2675, 3103, 3475, 4031, 5350, 6206, 6950, 8062, 14873, 15515, 20155, 29746, 31030, 40310, 74365, 77575, 100775, 148730, 155150, 201550, 371825, 431317, 743650, 862634, 2156585, 4313170, 10782925, 21565850]

約数ペア:

[(1, 21565850), (2, 10782925), (5, 4313170), (10, 2156585), (25, 862634), (29, 743650), (50, 431317), (58, 371825), (107, 201550), (139, 155150), (145, 148730), (214, 100775), (278, 77575), (290, 74365), (535, 40310), (695, 31030), (725, 29746), (1070, 20155), (1390, 15515), (1450, 14873), (2675, 8062), (3103, 6950), (3475, 6206), (4031, 5350)]