21002888

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{389}}^1\times {\mathrm{397}}^1$

素因数の和:809

約数の個数: 32

約数和(自身を含む): 41909400

約数和(自身を除く): 20906512

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 389, 397, 778, 794, 1556, 1588, 3112, 3176, 6613, 6749, 13226, 13498, 26452, 26996, 52904, 53992, 154433, 308866, 617732, 1235464, 2625361, 5250722, 10501444, 21002888]

約数ペア:

[(1, 21002888), (2, 10501444), (4, 5250722), (8, 2625361), (17, 1235464), (34, 617732), (68, 308866), (136, 154433), (389, 53992), (397, 52904), (778, 26996), (794, 26452), (1556, 13498), (1588, 13226), (3112, 6749), (3176, 6613)]