21342405

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1$

素因数の和:250

約数の個数: 64

約数和(自身を含む): 41564160

約数和(自身を除く): 20221755

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 43, 87, 105, 129, 145, 163, 203, 215, 301, 435, 489, 609, 645, 815, 903, 1015, 1141, 1247, 1505, 2445, 3045, 3423, 3741, 4515, 4727, 5705, 6235, 7009, 8729, 14181, 17115, 18705, 21027, 23635, 26187, 33089, 35045, 43645, 49063, 70905, 99267, 105135, 130935, 147189, 165445, 203261, 245315, 496335, 609783, 735945, 1016305, 1422827, 3048915, 4268481, 7114135, 21342405]

約数ペア:

[(1, 21342405), (3, 7114135), (5, 4268481), (7, 3048915), (15, 1422827), (21, 1016305), (29, 735945), (35, 609783), (43, 496335), (87, 245315), (105, 203261), (129, 165445), (145, 147189), (163, 130935), (203, 105135), (215, 99267), (301, 70905), (435, 49063), (489, 43645), (609, 35045), (645, 33089), (815, 26187), (903, 23635), (1015, 21027), (1141, 18705), (1247, 17115), (1505, 14181), (2445, 8729), (3045, 7009), (3423, 6235), (3741, 5705), (4515, 4727)]