21477645

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1663}}^1$

素因数の和:1722

約数の個数: 48

約数和(自身を含む): 43610112

約数和(自身を除く): 22132467

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 41, 45, 63, 105, 123, 205, 287, 315, 369, 615, 861, 1435, 1663, 1845, 2583, 4305, 4989, 8315, 11641, 12915, 14967, 24945, 34923, 58205, 68183, 74835, 104769, 174615, 204549, 340915, 477281, 523845, 613647, 1022745, 1431843, 2386405, 3068235, 4295529, 7159215, 21477645]

約数ペア:

[(1, 21477645), (3, 7159215), (5, 4295529), (7, 3068235), (9, 2386405), (15, 1431843), (21, 1022745), (35, 613647), (41, 523845), (45, 477281), (63, 340915), (105, 204549), (123, 174615), (205, 104769), (287, 74835), (315, 68183), (369, 58205), (615, 34923), (861, 24945), (1435, 14967), (1663, 12915), (1845, 11641), (2583, 8315), (4305, 4989)]