21470805

素因数分解:

$3^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1787}}^1$

素因数の和:1890

約数の個数: 32

約数和(自身を含む): 38620800

約数和(自身を除く): 17149995

約数列:

[1, 3, 5, 9, 15, 27, 45, 89, 135, 267, 445, 801, 1335, 1787, 2403, 4005, 5361, 8935, 12015, 16083, 26805, 48249, 80415, 159043, 241245, 477129, 795215, 1431387, 2385645, 4294161, 7156935, 21470805]

約数ペア:

[(1, 21470805), (3, 7156935), (5, 4294161), (9, 2385645), (15, 1431387), (27, 795215), (45, 477129), (89, 241245), (135, 159043), (267, 80415), (445, 48249), (801, 26805), (1335, 16083), (1787, 12015), (2403, 8935), (4005, 5361)]