21056170625

素因数分解:

$5^4\times 7^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1\times {\mathrm{307}}^1$

素因数の和:652

約数の個数: 80

約数和(自身を含む): 30782446464

約数和(自身を除く): 9726275839

約数列:

[1, 5, 7, 25, 35, 61, 125, 175, 257, 305, 307, 427, 625, 875, 1285, 1525, 1535, 1799, 2135, 2149, 4375, 6425, 7625, 7675, 8995, 10675, 10745, 15677, 18727, 32125, 38125, 38375, 44975, 53375, 53725, 78385, 78899, 93635, 109739, 131089, 160625, 191875, 224875, 266875, 268625, 391925, 394495, 468175, 548695, 552293, 655445, 1124375, 1343125, 1959625, 1972475, 2340875, 2743475, 2761465, 3277225, 4812839, 9798125, 9862375, 11704375, 13717375, 13807325, 16386125, 24064195, 33689873, 49311875, 68586875, 69036625, 81930625, 120320975, 168449365, 345183125, 601604875, 842246825, 3008024375, 4211234125, 21056170625]

約数ペア:

[(1, 21056170625), (5, 4211234125), (7, 3008024375), (25, 842246825), (35, 601604875), (61, 345183125), (125, 168449365), (175, 120320975), (257, 81930625), (305, 69036625), (307, 68586875), (427, 49311875), (625, 33689873), (875, 24064195), (1285, 16386125), (1525, 13807325), (1535, 13717375), (1799, 11704375), (2135, 9862375), (2149, 9798125), (4375, 4812839), (6425, 3277225), (7625, 2761465), (7675, 2743475), (8995, 2340875), (10675, 1972475), (10745, 1959625), (15677, 1343125), (18727, 1124375), (32125, 655445), (38125, 552293), (38375, 548695), (44975, 468175), (53375, 394495), (53725, 391925), (78385, 268625), (78899, 266875), (93635, 224875), (109739, 191875), (131089, 160625)]