18131080

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{463}}^1$

素因数の和:574

約数の個数: 64

約数和(自身を含む): 45100800

約数和(自身を除く): 26969720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 89, 110, 178, 220, 356, 440, 445, 463, 712, 890, 926, 979, 1780, 1852, 1958, 2315, 3560, 3704, 3916, 4630, 4895, 5093, 7832, 9260, 9790, 10186, 18520, 19580, 20372, 25465, 39160, 40744, 41207, 50930, 82414, 101860, 164828, 203720, 206035, 329656, 412070, 453277, 824140, 906554, 1648280, 1813108, 2266385, 3626216, 4532770, 9065540, 18131080]

約数ペア:

[(1, 18131080), (2, 9065540), (4, 4532770), (5, 3626216), (8, 2266385), (10, 1813108), (11, 1648280), (20, 906554), (22, 824140), (40, 453277), (44, 412070), (55, 329656), (88, 206035), (89, 203720), (110, 164828), (178, 101860), (220, 82414), (356, 50930), (440, 41207), (445, 40744), (463, 39160), (712, 25465), (890, 20372), (926, 19580), (979, 18520), (1780, 10186), (1852, 9790), (1958, 9260), (2315, 7832), (3560, 5093), (3704, 4895), (3916, 4630)]