21877075

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 32140800

約数和(自身を除く): 10263725

約数列:

[1, 5, 11, 19, 25, 53, 55, 79, 95, 209, 265, 275, 395, 475, 583, 869, 1007, 1045, 1325, 1501, 1975, 2915, 4187, 4345, 5035, 5225, 7505, 11077, 14575, 16511, 20935, 21725, 25175, 37525, 46057, 55385, 79553, 82555, 104675, 230285, 276925, 397765, 412775, 875083, 1151425, 1988825, 4375415, 21877075]

約数ペア:

[(1, 21877075), (5, 4375415), (11, 1988825), (19, 1151425), (25, 875083), (53, 412775), (55, 397765), (79, 276925), (95, 230285), (209, 104675), (265, 82555), (275, 79553), (395, 55385), (475, 46057), (583, 37525), (869, 25175), (1007, 21725), (1045, 20935), (1325, 16511), (1501, 14575), (1975, 11077), (2915, 7505), (4187, 5225), (4345, 5035)]