21027856

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{137}}^1\times {\mathrm{181}}^1$

素因数の和:379

約数の個数: 40

約数和(自身を含む): 42044184

約数和(自身を除く): 21016328

約数列:

[1, 2, 4, 8, 16, 53, 106, 137, 181, 212, 274, 362, 424, 548, 724, 848, 1096, 1448, 2192, 2896, 7261, 9593, 14522, 19186, 24797, 29044, 38372, 49594, 58088, 76744, 99188, 116176, 153488, 198376, 396752, 1314241, 2628482, 5256964, 10513928, 21027856]

約数ペア:

[(1, 21027856), (2, 10513928), (4, 5256964), (8, 2628482), (16, 1314241), (53, 396752), (106, 198376), (137, 153488), (181, 116176), (212, 99188), (274, 76744), (362, 58088), (424, 49594), (548, 38372), (724, 29044), (848, 24797), (1096, 19186), (1448, 14522), (2192, 9593), (2896, 7261)]