20008120

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1229}}^1$

素因数の和:1288

約数の個数: 64

約数和(自身を含む): 50479200

約数和(自身を除く): 30471080

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 110, 148, 185, 220, 296, 370, 407, 440, 740, 814, 1229, 1480, 1628, 2035, 2458, 3256, 4070, 4916, 6145, 8140, 9832, 12290, 13519, 16280, 24580, 27038, 45473, 49160, 54076, 67595, 90946, 108152, 135190, 181892, 227365, 270380, 363784, 454730, 500203, 540760, 909460, 1000406, 1818920, 2000812, 2501015, 4001624, 5002030, 10004060, 20008120]

約数ペア:

[(1, 20008120), (2, 10004060), (4, 5002030), (5, 4001624), (8, 2501015), (10, 2000812), (11, 1818920), (20, 1000406), (22, 909460), (37, 540760), (40, 500203), (44, 454730), (55, 363784), (74, 270380), (88, 227365), (110, 181892), (148, 135190), (185, 108152), (220, 90946), (296, 67595), (370, 54076), (407, 49160), (440, 45473), (740, 27038), (814, 24580), (1229, 16280), (1480, 13519), (1628, 12290), (2035, 9832), (2458, 8140), (3256, 6145), (4070, 4916)]