21108241

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{239}}^1$

素因数の和:325

約数の個数: 32

約数和(自身を含む): 28016640

約数和(自身を除く): 6908399

約数列:

[1, 7, 11, 31, 37, 77, 217, 239, 259, 341, 407, 1147, 1673, 2387, 2629, 2849, 7409, 8029, 8843, 12617, 18403, 51863, 61901, 81499, 88319, 97273, 274133, 570493, 680911, 1918931, 3015463, 21108241]

約数ペア:

[(1, 21108241), (7, 3015463), (11, 1918931), (31, 680911), (37, 570493), (77, 274133), (217, 97273), (239, 88319), (259, 81499), (341, 61901), (407, 51863), (1147, 18403), (1673, 12617), (2387, 8843), (2629, 8029), (2849, 7409)]