21801255

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{397}}^1\times {\mathrm{523}}^1$

素因数の和:935

約数の個数: 32

約数和(自身を含む): 40041984

約数和(自身を除く): 18240729

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 397, 523, 1191, 1569, 1985, 2615, 2779, 3661, 5955, 7845, 8337, 10983, 13895, 18305, 41685, 54915, 207631, 622893, 1038155, 1453417, 3114465, 4360251, 7267085, 21801255]

約数ペア:

[(1, 21801255), (3, 7267085), (5, 4360251), (7, 3114465), (15, 1453417), (21, 1038155), (35, 622893), (105, 207631), (397, 54915), (523, 41685), (1191, 18305), (1569, 13895), (1985, 10983), (2615, 8337), (2779, 7845), (3661, 5955)]