21597705

素因数分解:

$3^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1019}}^1$

素因数の和:1190

約数の個数: 32

約数和(自身を含む): 38678400

約数和(自身を除く): 17080695

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157, 471, 785, 1019, 1413, 2355, 3057, 4239, 5095, 7065, 9171, 15285, 21195, 27513, 45855, 137565, 159983, 479949, 799915, 1439847, 2399745, 4319541, 7199235, 21597705]

約数ペア:

[(1, 21597705), (3, 7199235), (5, 4319541), (9, 2399745), (15, 1439847), (27, 799915), (45, 479949), (135, 159983), (157, 137565), (471, 45855), (785, 27513), (1019, 21195), (1413, 15285), (2355, 9171), (3057, 7065), (4239, 5095)]