28020590

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{409}}^1$

素因数の和:477

約数の個数: 64

約数和(自身を含む): 59512320

約数和(自身を除く): 31491730

約数列:

[1, 2, 5, 10, 13, 17, 26, 31, 34, 62, 65, 85, 130, 155, 170, 221, 310, 403, 409, 442, 527, 806, 818, 1054, 1105, 2015, 2045, 2210, 2635, 4030, 4090, 5270, 5317, 6851, 6953, 10634, 12679, 13702, 13906, 25358, 26585, 34255, 34765, 53170, 63395, 68510, 69530, 90389, 126790, 164827, 180778, 215543, 329654, 431086, 451945, 824135, 903890, 1077715, 1648270, 2155430, 2802059, 5604118, 14010295, 28020590]

約数ペア:

[(1, 28020590), (2, 14010295), (5, 5604118), (10, 2802059), (13, 2155430), (17, 1648270), (26, 1077715), (31, 903890), (34, 824135), (62, 451945), (65, 431086), (85, 329654), (130, 215543), (155, 180778), (170, 164827), (221, 126790), (310, 90389), (403, 69530), (409, 68510), (442, 63395), (527, 53170), (806, 34765), (818, 34255), (1054, 26585), (1105, 25358), (2015, 13906), (2045, 13702), (2210, 12679), (2635, 10634), (4030, 6953), (4090, 6851), (5270, 5317)]