81105680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53359}}^1$

素因数の和:53391

約数の個数: 40

約数和(自身を含む): 198499200

約数和(自身を除く): 117393520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 53359, 106718, 213436, 266795, 426872, 533590, 853744, 1013821, 1067180, 2027642, 2134360, 4055284, 4268720, 5069105, 8110568, 10138210, 16221136, 20276420, 40552840, 81105680]

約数ペア:

[(1, 81105680), (2, 40552840), (4, 20276420), (5, 16221136), (8, 10138210), (10, 8110568), (16, 5069105), (19, 4268720), (20, 4055284), (38, 2134360), (40, 2027642), (76, 1067180), (80, 1013821), (95, 853744), (152, 533590), (190, 426872), (304, 266795), (380, 213436), (760, 106718), (1520, 53359)]