21565159

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{229}}^1\times {\mathrm{1223}}^1$

素因数の和:1470

約数の個数: 16

約数和(自身を含む): 27025920

約数和(自身を除く): 5460761

約数列:

[1, 7, 11, 77, 229, 1223, 1603, 2519, 8561, 13453, 17633, 94171, 280067, 1960469, 3080737, 21565159]

約数ペア:

[(1, 21565159), (7, 3080737), (11, 1960469), (77, 280067), (229, 94171), (1223, 17633), (1603, 13453), (2519, 8561)]