21095505

素因数分解:

$3^3\times 5^1\times {\mathrm{307}}^1\times {\mathrm{509}}^1$

素因数の和:830

約数の個数: 32

約数和(自身を含む): 37699200

約数和(自身を除く): 16603695

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 307, 509, 921, 1527, 1535, 2545, 2763, 4581, 4605, 7635, 8289, 13743, 13815, 22905, 41445, 68715, 156263, 468789, 781315, 1406367, 2343945, 4219101, 7031835, 21095505]

約数ペア:

[(1, 21095505), (3, 7031835), (5, 4219101), (9, 2343945), (15, 1406367), (27, 781315), (45, 468789), (135, 156263), (307, 68715), (509, 41445), (921, 22905), (1527, 13815), (1535, 13743), (2545, 8289), (2763, 7635), (4581, 4605)]