21501964799

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{491}}^1\times {\mathrm{1993}}^1$

素因数の和:2607

約数の個数: 32

約数和(自身を含む): 25554338304

約数和(自身を除く): 4052373505

約数列:

[1, 7, 43, 73, 301, 491, 511, 1993, 3139, 3437, 13951, 21113, 21973, 35843, 85699, 145489, 147791, 250901, 599893, 978563, 1018423, 1541249, 6256027, 6849941, 10788743, 42078209, 43792189, 71435099, 294547463, 500045693, 3071709257, 21501964799]

約数ペア:

[(1, 21501964799), (7, 3071709257), (43, 500045693), (73, 294547463), (301, 71435099), (491, 43792189), (511, 42078209), (1993, 10788743), (3139, 6849941), (3437, 6256027), (13951, 1541249), (21113, 1018423), (21973, 978563), (35843, 599893), (85699, 250901), (145489, 147791)]