21491044705

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{503}}^1\times {\mathrm{857}}^1$

素因数の和:1450

約数の個数: 48

約数和(自身を含む): 28488620160

約数和(自身を除く): 6997575455

約数列:

[1, 5, 13, 59, 65, 169, 295, 503, 767, 845, 857, 2515, 3835, 4285, 6539, 9971, 11141, 29677, 32695, 49855, 50563, 55705, 85007, 144833, 148385, 252815, 385801, 425035, 431071, 657319, 724165, 1929005, 2155355, 3286595, 5015413, 5603923, 8545147, 25077065, 25433189, 28019615, 42725735, 72850999, 127165945, 330631457, 364254995, 1653157285, 4298208941, 21491044705]

約数ペア:

[(1, 21491044705), (5, 4298208941), (13, 1653157285), (59, 364254995), (65, 330631457), (169, 127165945), (295, 72850999), (503, 42725735), (767, 28019615), (845, 25433189), (857, 25077065), (2515, 8545147), (3835, 5603923), (4285, 5015413), (6539, 3286595), (9971, 2155355), (11141, 1929005), (29677, 724165), (32695, 657319), (49855, 431071), (50563, 425035), (55705, 385801), (85007, 252815), (144833, 148385)]