21678995

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{853}}^1$

素因数の和:911

約数の個数: 32

約数和(自身を含む): 30989952

約数和(自身を除く): 9310957

約数列:

[1, 5, 13, 17, 23, 65, 85, 115, 221, 299, 391, 853, 1105, 1495, 1955, 4265, 5083, 11089, 14501, 19619, 25415, 55445, 72505, 98095, 188513, 255047, 333523, 942565, 1275235, 1667615, 4335799, 21678995]

約数ペア:

[(1, 21678995), (5, 4335799), (13, 1667615), (17, 1275235), (23, 942565), (65, 333523), (85, 255047), (115, 188513), (221, 98095), (299, 72505), (391, 55445), (853, 25415), (1105, 19619), (1495, 14501), (1955, 11089), (4265, 5083)]