21992509

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{317}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 29673216

約数和(自身を除く): 7680707

約数列:

[1, 7, 11, 17, 53, 77, 119, 187, 317, 371, 583, 901, 1309, 2219, 3487, 4081, 5389, 6307, 9911, 16801, 24409, 37723, 59279, 69377, 117607, 184811, 285617, 414953, 1293677, 1999319, 3141787, 21992509]

約数ペア:

[(1, 21992509), (7, 3141787), (11, 1999319), (17, 1293677), (53, 414953), (77, 285617), (119, 184811), (187, 117607), (317, 69377), (371, 59279), (583, 37723), (901, 24409), (1309, 16801), (2219, 9911), (3487, 6307), (4081, 5389)]