21000391615

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{14747}}^1$

素因数の和:14872

約数の個数: 64

約数和(自身を含む): 31600834560

約数和(自身を除く): 10600442945

約数列:

[1, 5, 7, 23, 29, 35, 61, 115, 145, 161, 203, 305, 427, 667, 805, 1015, 1403, 1769, 2135, 3335, 4669, 7015, 8845, 9821, 12383, 14747, 23345, 40687, 49105, 61915, 73735, 103229, 203435, 284809, 339181, 427663, 516145, 899567, 1424045, 1695905, 2138315, 2374267, 2993641, 4497835, 6296969, 9836249, 11871335, 14968205, 20690041, 26087443, 31484845, 49181245, 68853743, 103450205, 130437215, 144830287, 182612101, 344268715, 600011189, 724151435, 913060505, 3000055945, 4200078323, 21000391615]

約数ペア:

[(1, 21000391615), (5, 4200078323), (7, 3000055945), (23, 913060505), (29, 724151435), (35, 600011189), (61, 344268715), (115, 182612101), (145, 144830287), (161, 130437215), (203, 103450205), (305, 68853743), (427, 49181245), (667, 31484845), (805, 26087443), (1015, 20690041), (1403, 14968205), (1769, 11871335), (2135, 9836249), (3335, 6296969), (4669, 4497835), (7015, 2993641), (8845, 2374267), (9821, 2138315), (12383, 1695905), (14747, 1424045), (23345, 899567), (40687, 516145), (49105, 427663), (61915, 339181), (73735, 284809), (103229, 203435)]