21059465

素因数分解:

$5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{1999}}^1$

素因数の和:2061

約数の個数: 24

約数和(自身を含む): 30096000

約数和(自身を除く): 9036535

約数列:

[1, 5, 7, 35, 43, 49, 215, 245, 301, 1505, 1999, 2107, 9995, 10535, 13993, 69965, 85957, 97951, 429785, 489755, 601699, 3008495, 4211893, 21059465]

約数ペア:

[(1, 21059465), (5, 4211893), (7, 3008495), (35, 601699), (43, 489755), (49, 429785), (215, 97951), (245, 85957), (301, 69965), (1505, 13993), (1999, 10535), (2107, 9995)]