28152020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{8329}}^1$

素因数の和:8364

約数の個数: 36

約数和(自身を含む): 64024380

約数和(自身を除く): 35872360

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 8329, 16658, 33316, 41645, 83290, 108277, 166580, 216554, 433108, 541385, 1082770, 1407601, 2165540, 2815202, 5630404, 7038005, 14076010, 28152020]

約数ペア:

[(1, 28152020), (2, 14076010), (4, 7038005), (5, 5630404), (10, 2815202), (13, 2165540), (20, 1407601), (26, 1082770), (52, 541385), (65, 433108), (130, 216554), (169, 166580), (260, 108277), (338, 83290), (676, 41645), (845, 33316), (1690, 16658), (3380, 8329)]