21320312

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{389}}^1$

素因数の和:456

約数の個数: 64

約数和(自身を含む): 47174400

約数和(自身を除く): 25854088

約数列:

[1, 2, 4, 8, 13, 17, 26, 31, 34, 52, 62, 68, 104, 124, 136, 221, 248, 389, 403, 442, 527, 778, 806, 884, 1054, 1556, 1612, 1768, 2108, 3112, 3224, 4216, 5057, 6613, 6851, 10114, 12059, 13226, 13702, 20228, 24118, 26452, 27404, 40456, 48236, 52904, 54808, 85969, 96472, 156767, 171938, 205003, 313534, 343876, 410006, 627068, 687752, 820012, 1254136, 1640024, 2665039, 5330078, 10660156, 21320312]

約数ペア:

[(1, 21320312), (2, 10660156), (4, 5330078), (8, 2665039), (13, 1640024), (17, 1254136), (26, 820012), (31, 687752), (34, 627068), (52, 410006), (62, 343876), (68, 313534), (104, 205003), (124, 171938), (136, 156767), (221, 96472), (248, 85969), (389, 54808), (403, 52904), (442, 48236), (527, 40456), (778, 27404), (806, 26452), (884, 24118), (1054, 20228), (1556, 13702), (1612, 13226), (1768, 12059), (2108, 10114), (3112, 6851), (3224, 6613), (4216, 5057)]