21578505

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{2699}}^1$

素因数の和:2761

約数の個数: 32

約数和(自身を含む): 38102400

約数和(自身を除く): 16523895

約数列:

[1, 3, 5, 13, 15, 39, 41, 65, 123, 195, 205, 533, 615, 1599, 2665, 2699, 7995, 8097, 13495, 35087, 40485, 105261, 110659, 175435, 331977, 526305, 553295, 1438567, 1659885, 4315701, 7192835, 21578505]

約数ペア:

[(1, 21578505), (3, 7192835), (5, 4315701), (13, 1659885), (15, 1438567), (39, 553295), (41, 526305), (65, 331977), (123, 175435), (195, 110659), (205, 105261), (533, 40485), (615, 35087), (1599, 13495), (2665, 8097), (2699, 7995)]