21231945

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{9629}}^1$

素因数の和:9654

約数の個数: 36

約数和(自身を含む): 42814980

約数和(自身を除く): 21583035

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 441, 735, 2205, 9629, 28887, 48145, 67403, 86661, 144435, 202209, 337015, 433305, 471821, 606627, 1011045, 1415463, 2359105, 3033135, 4246389, 7077315, 21231945]

約数ペア:

[(1, 21231945), (3, 7077315), (5, 4246389), (7, 3033135), (9, 2359105), (15, 1415463), (21, 1011045), (35, 606627), (45, 471821), (49, 433305), (63, 337015), (105, 202209), (147, 144435), (245, 86661), (315, 67403), (441, 48145), (735, 28887), (2205, 9629)]