28116920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{389}}^1$

素因数の和:552

約数の個数: 64

約数和(自身を含む): 68796000

約数和(自身を除く): 40679080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 139, 260, 278, 389, 520, 556, 695, 778, 1112, 1390, 1556, 1807, 1945, 2780, 3112, 3614, 3890, 5057, 5560, 7228, 7780, 9035, 10114, 14456, 15560, 18070, 20228, 25285, 36140, 40456, 50570, 54071, 72280, 101140, 108142, 202280, 216284, 270355, 432568, 540710, 702923, 1081420, 1405846, 2162840, 2811692, 3514615, 5623384, 7029230, 14058460, 28116920]

約数ペア:

[(1, 28116920), (2, 14058460), (4, 7029230), (5, 5623384), (8, 3514615), (10, 2811692), (13, 2162840), (20, 1405846), (26, 1081420), (40, 702923), (52, 540710), (65, 432568), (104, 270355), (130, 216284), (139, 202280), (260, 108142), (278, 101140), (389, 72280), (520, 54071), (556, 50570), (695, 40456), (778, 36140), (1112, 25285), (1390, 20228), (1556, 18070), (1807, 15560), (1945, 14456), (2780, 10114), (3112, 9035), (3614, 7780), (3890, 7228), (5057, 5560)]