21001645

素因数分解:

$5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{3727}}^1$

素因数の和:3769

約数の個数: 24

約数和(自身を含む): 30599424

約数和(自身を除く): 9597779

約数列:

[1, 5, 7, 23, 35, 49, 115, 161, 245, 805, 1127, 3727, 5635, 18635, 26089, 85721, 130445, 182623, 428605, 600047, 913115, 3000235, 4200329, 21001645]

約数ペア:

[(1, 21001645), (5, 4200329), (7, 3000235), (23, 913115), (35, 600047), (49, 428605), (115, 182623), (161, 130445), (245, 85721), (805, 26089), (1127, 18635), (3727, 5635)]