20171693180

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{449}}^1\times {\mathrm{72461}}^1$

素因数の和:72950

約数の個数: 48

約数和(自身を含む): 43825017600

約数和(自身を除く): 23653324420

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 449, 620, 898, 1796, 2245, 4490, 8980, 13919, 27838, 55676, 69595, 72461, 139190, 144922, 278380, 289844, 362305, 724610, 1449220, 2246291, 4492582, 8985164, 11231455, 22462910, 32534989, 44925820, 65069978, 130139956, 162674945, 325349890, 650699780, 1008584659, 2017169318, 4034338636, 5042923295, 10085846590, 20171693180]

約数ペア:

[(1, 20171693180), (2, 10085846590), (4, 5042923295), (5, 4034338636), (10, 2017169318), (20, 1008584659), (31, 650699780), (62, 325349890), (124, 162674945), (155, 130139956), (310, 65069978), (449, 44925820), (620, 32534989), (898, 22462910), (1796, 11231455), (2245, 8985164), (4490, 4492582), (8980, 2246291), (13919, 1449220), (27838, 724610), (55676, 362305), (69595, 289844), (72461, 278380), (139190, 144922)]