20615620

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{811}}^1$

素因数の和:892

約数の個数: 48

約数和(自身を含む): 45835776

約数和(自身を除く): 25220156

約数列:

[1, 2, 4, 5, 10, 20, 31, 41, 62, 82, 124, 155, 164, 205, 310, 410, 620, 811, 820, 1271, 1622, 2542, 3244, 4055, 5084, 6355, 8110, 12710, 16220, 25141, 25420, 33251, 50282, 66502, 100564, 125705, 133004, 166255, 251410, 332510, 502820, 665020, 1030781, 2061562, 4123124, 5153905, 10307810, 20615620]

約数ペア:

[(1, 20615620), (2, 10307810), (4, 5153905), (5, 4123124), (10, 2061562), (20, 1030781), (31, 665020), (41, 502820), (62, 332510), (82, 251410), (124, 166255), (155, 133004), (164, 125705), (205, 100564), (310, 66502), (410, 50282), (620, 33251), (811, 25420), (820, 25141), (1271, 16220), (1622, 12710), (2542, 8110), (3244, 6355), (4055, 5084)]