81099920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{587}}^1$

素因数の和:768

約数の個数: 80

約数和(自身を含む): 207361728

約数和(自身を除く): 126261808

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 157, 176, 220, 314, 440, 587, 628, 785, 880, 1174, 1256, 1570, 1727, 2348, 2512, 2935, 3140, 3454, 4696, 5870, 6280, 6457, 6908, 8635, 9392, 11740, 12560, 12914, 13816, 17270, 23480, 25828, 27632, 32285, 34540, 46960, 51656, 64570, 69080, 92159, 103312, 129140, 138160, 184318, 258280, 368636, 460795, 516560, 737272, 921590, 1013749, 1474544, 1843180, 2027498, 3686360, 4054996, 5068745, 7372720, 8109992, 10137490, 16219984, 20274980, 40549960, 81099920]

約数ペア:

[(1, 81099920), (2, 40549960), (4, 20274980), (5, 16219984), (8, 10137490), (10, 8109992), (11, 7372720), (16, 5068745), (20, 4054996), (22, 3686360), (40, 2027498), (44, 1843180), (55, 1474544), (80, 1013749), (88, 921590), (110, 737272), (157, 516560), (176, 460795), (220, 368636), (314, 258280), (440, 184318), (587, 138160), (628, 129140), (785, 103312), (880, 92159), (1174, 69080), (1256, 64570), (1570, 51656), (1727, 46960), (2348, 34540), (2512, 32285), (2935, 27632), (3140, 25828), (3454, 23480), (4696, 17270), (5870, 13816), (6280, 12914), (6457, 12560), (6908, 11740), (8635, 9392)]