21531788

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{3881}}^1$

素因数の和:3977

約数の個数: 24

約数和(自身を含む): 40217520

約数和(自身を除く): 18685732

約数列:

[1, 2, 4, 19, 38, 73, 76, 146, 292, 1387, 2774, 3881, 5548, 7762, 15524, 73739, 147478, 283313, 294956, 566626, 1133252, 5382947, 10765894, 21531788]

約数ペア:

[(1, 21531788), (2, 10765894), (4, 5382947), (19, 1133252), (38, 566626), (73, 294956), (76, 283313), (146, 147478), (292, 73739), (1387, 15524), (2774, 7762), (3881, 5548)]