20215525

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 29730240

約数和(自身を除く): 9514715

約数列:

[1, 5, 11, 19, 25, 53, 55, 73, 95, 209, 265, 275, 365, 475, 583, 803, 1007, 1045, 1325, 1387, 1825, 2915, 3869, 4015, 5035, 5225, 6935, 11077, 14575, 15257, 19345, 20075, 25175, 34675, 42559, 55385, 73511, 76285, 96725, 212795, 276925, 367555, 381425, 808621, 1063975, 1837775, 4043105, 20215525]

約数ペア:

[(1, 20215525), (5, 4043105), (11, 1837775), (19, 1063975), (25, 808621), (53, 381425), (55, 367555), (73, 276925), (95, 212795), (209, 96725), (265, 76285), (275, 73511), (365, 55385), (475, 42559), (583, 34675), (803, 25175), (1007, 20075), (1045, 19345), (1325, 15257), (1387, 14575), (1825, 11077), (2915, 6935), (3869, 5225), (4015, 5035)]