21691645

素因数分解:

$5^1\times {\mathrm{23}}^2\times {\mathrm{59}}^1\times {\mathrm{139}}^1$

素因数の和:249

約数の個数: 24

約数和(自身を含む): 27871200

約数和(自身を除く): 6179555

約数列:

[1, 5, 23, 59, 115, 139, 295, 529, 695, 1357, 2645, 3197, 6785, 8201, 15985, 31211, 41005, 73531, 156055, 188623, 367655, 943115, 4338329, 21691645]

約数ペア:

[(1, 21691645), (5, 4338329), (23, 943115), (59, 367655), (115, 188623), (139, 156055), (295, 73531), (529, 41005), (695, 31211), (1357, 15985), (2645, 8201), (3197, 6785)]