21353745

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{4327}}^1$

素因数の和:4389

約数の個数: 32

約数和(自身を含む): 39886848

約数和(自身を除く): 18533103

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 105, 141, 235, 329, 705, 987, 1645, 4327, 4935, 12981, 21635, 30289, 64905, 90867, 151445, 203369, 454335, 610107, 1016845, 1423583, 3050535, 4270749, 7117915, 21353745]

約数ペア:

[(1, 21353745), (3, 7117915), (5, 4270749), (7, 3050535), (15, 1423583), (21, 1016845), (35, 610107), (47, 454335), (105, 203369), (141, 151445), (235, 90867), (329, 64905), (705, 30289), (987, 21635), (1645, 12981), (4327, 4935)]