21115688

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{173}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 46353600

約数和(自身を除く): 25237912

約数列:

[1, 2, 4, 8, 11, 19, 22, 38, 44, 73, 76, 88, 146, 152, 173, 209, 292, 346, 418, 584, 692, 803, 836, 1384, 1387, 1606, 1672, 1903, 2774, 3212, 3287, 3806, 5548, 6424, 6574, 7612, 11096, 12629, 13148, 15224, 15257, 25258, 26296, 30514, 36157, 50516, 61028, 72314, 101032, 122056, 138919, 144628, 239951, 277838, 289256, 479902, 555676, 959804, 1111352, 1919608, 2639461, 5278922, 10557844, 21115688]

約数ペア:

[(1, 21115688), (2, 10557844), (4, 5278922), (8, 2639461), (11, 1919608), (19, 1111352), (22, 959804), (38, 555676), (44, 479902), (73, 289256), (76, 277838), (88, 239951), (146, 144628), (152, 138919), (173, 122056), (209, 101032), (292, 72314), (346, 61028), (418, 50516), (584, 36157), (692, 30514), (803, 26296), (836, 25258), (1384, 15257), (1387, 15224), (1606, 13148), (1672, 12629), (1903, 11096), (2774, 7612), (3212, 6574), (3287, 6424), (3806, 5548)]