21291248

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{6367}}^1$

素因数の和:6405

約数の個数: 40

約数和(自身を含む): 47377920

約数和(自身を除く): 26086672

約数列:

[1, 2, 4, 8, 11, 16, 19, 22, 38, 44, 76, 88, 152, 176, 209, 304, 418, 836, 1672, 3344, 6367, 12734, 25468, 50936, 70037, 101872, 120973, 140074, 241946, 280148, 483892, 560296, 967784, 1120592, 1330703, 1935568, 2661406, 5322812, 10645624, 21291248]

約数ペア:

[(1, 21291248), (2, 10645624), (4, 5322812), (8, 2661406), (11, 1935568), (16, 1330703), (19, 1120592), (22, 967784), (38, 560296), (44, 483892), (76, 280148), (88, 241946), (152, 140074), (176, 120973), (209, 101872), (304, 70037), (418, 50936), (836, 25468), (1672, 12734), (3344, 6367)]