21490665

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{4177}}^1$

素因数の和:4206

約数の個数: 32

約数和(自身を含む): 40108800

約数和(自身を除く): 18618135

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 343, 735, 1029, 1715, 4177, 5145, 12531, 20885, 29239, 62655, 87717, 146195, 204673, 438585, 614019, 1023365, 1432711, 3070095, 4298133, 7163555, 21490665]

約数ペア:

[(1, 21490665), (3, 7163555), (5, 4298133), (7, 3070095), (15, 1432711), (21, 1023365), (35, 614019), (49, 438585), (105, 204673), (147, 146195), (245, 87717), (343, 62655), (735, 29239), (1029, 20885), (1715, 12531), (4177, 5145)]