21609105

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{1571}}^1$

素因数の和:1717

約数の個数: 32

約数和(自身を含む): 39840768

約数和(自身を除く): 18231663

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 131, 393, 655, 917, 1571, 1965, 2751, 4585, 4713, 7855, 10997, 13755, 23565, 32991, 54985, 164955, 205801, 617403, 1029005, 1440607, 3087015, 4321821, 7203035, 21609105]

約数ペア:

[(1, 21609105), (3, 7203035), (5, 4321821), (7, 3087015), (15, 1440607), (21, 1029005), (35, 617403), (105, 205801), (131, 164955), (393, 54985), (655, 32991), (917, 23565), (1571, 13755), (1965, 10997), (2751, 7855), (4585, 4713)]