216981505

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{1087}}^1$

素因数の和:1225

約数の個数: 32

約数和(自身を含む): 291723264

約数和(自身を除く): 74741759

約数列:

[1, 5, 13, 37, 65, 83, 185, 415, 481, 1079, 1087, 2405, 3071, 5395, 5435, 14131, 15355, 39923, 40219, 70655, 90221, 199615, 201095, 451105, 522847, 1172873, 2614235, 3338177, 5864365, 16690885, 43396301, 216981505]

約数ペア:

[(1, 216981505), (5, 43396301), (13, 16690885), (37, 5864365), (65, 3338177), (83, 2614235), (185, 1172873), (415, 522847), (481, 451105), (1079, 201095), (1087, 199615), (2405, 90221), (3071, 70655), (5395, 40219), (5435, 39923), (14131, 15355)]