21379028

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{239}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 22166572

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 76, 107, 209, 214, 239, 418, 428, 478, 836, 956, 1177, 2033, 2354, 2629, 4066, 4541, 4708, 5258, 8132, 9082, 10516, 18164, 22363, 25573, 44726, 49951, 51146, 89452, 99902, 102292, 199804, 281303, 485887, 562606, 971774, 1125212, 1943548, 5344757, 10689514, 21379028]

約数ペア:

[(1, 21379028), (2, 10689514), (4, 5344757), (11, 1943548), (19, 1125212), (22, 971774), (38, 562606), (44, 485887), (76, 281303), (107, 199804), (209, 102292), (214, 99902), (239, 89452), (418, 51146), (428, 49951), (478, 44726), (836, 25573), (956, 22363), (1177, 18164), (2033, 10516), (2354, 9082), (2629, 8132), (4066, 5258), (4541, 4708)]