21979305

素因数分解:

$3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4481}}^1$

素因数の和:4601

約数の個数: 24

約数和(自身を含む): 38455560

約数和(自身を除く): 16476255

約数列:

[1, 3, 5, 9, 15, 45, 109, 327, 545, 981, 1635, 4481, 4905, 13443, 22405, 40329, 67215, 201645, 488429, 1465287, 2442145, 4395861, 7326435, 21979305]

約数ペア:

[(1, 21979305), (3, 7326435), (5, 4395861), (9, 2442145), (15, 1465287), (45, 488429), (109, 201645), (327, 67215), (545, 40329), (981, 22405), (1635, 13443), (4481, 4905)]