81805240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{2089}}^1$

素因数の和:2200

約数の個数: 64

約数和(自身を含む): 203148000

約数和(自身を除く): 121342760

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 89, 110, 178, 220, 356, 440, 445, 712, 890, 979, 1780, 1958, 2089, 3560, 3916, 4178, 4895, 7832, 8356, 9790, 10445, 16712, 19580, 20890, 22979, 39160, 41780, 45958, 83560, 91916, 114895, 183832, 185921, 229790, 371842, 459580, 743684, 919160, 929605, 1487368, 1859210, 2045131, 3718420, 4090262, 7436840, 8180524, 10225655, 16361048, 20451310, 40902620, 81805240]

約数ペア:

[(1, 81805240), (2, 40902620), (4, 20451310), (5, 16361048), (8, 10225655), (10, 8180524), (11, 7436840), (20, 4090262), (22, 3718420), (40, 2045131), (44, 1859210), (55, 1487368), (88, 929605), (89, 919160), (110, 743684), (178, 459580), (220, 371842), (356, 229790), (440, 185921), (445, 183832), (712, 114895), (890, 91916), (979, 83560), (1780, 45958), (1958, 41780), (2089, 39160), (3560, 22979), (3916, 20890), (4178, 19580), (4895, 16712), (7832, 10445), (8356, 9790)]