21493784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{233}}^1\times {\mathrm{887}}^1$

素因数の和:1139

約数の個数: 32

約数和(自身を含む): 43636320

約数和(自身を除く): 22142536

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 233, 466, 887, 932, 1774, 1864, 3029, 3548, 6058, 7096, 11531, 12116, 23062, 24232, 46124, 92248, 206671, 413342, 826684, 1653368, 2686723, 5373446, 10746892, 21493784]

約数ペア:

[(1, 21493784), (2, 10746892), (4, 5373446), (8, 2686723), (13, 1653368), (26, 826684), (52, 413342), (104, 206671), (233, 92248), (466, 46124), (887, 24232), (932, 23062), (1774, 12116), (1864, 11531), (3029, 7096), (3548, 6058)]