221821925

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{167}}^1$

素因数の和:318

約数の個数: 48

約数和(自身を含む): 307396992

約数和(自身を除く): 85575067

約数列:

[1, 5, 13, 25, 61, 65, 67, 167, 305, 325, 335, 793, 835, 871, 1525, 1675, 2171, 3965, 4087, 4175, 4355, 10187, 10855, 11189, 19825, 20435, 21775, 50935, 53131, 54275, 55945, 102175, 132431, 145457, 254675, 265655, 279725, 662155, 682529, 727285, 1328275, 3310775, 3412645, 3636425, 8872877, 17063225, 44364385, 221821925]

約数ペア:

[(1, 221821925), (5, 44364385), (13, 17063225), (25, 8872877), (61, 3636425), (65, 3412645), (67, 3310775), (167, 1328275), (305, 727285), (325, 682529), (335, 662155), (793, 279725), (835, 265655), (871, 254675), (1525, 145457), (1675, 132431), (2171, 102175), (3965, 55945), (4087, 54275), (4175, 53131), (4355, 50935), (10187, 21775), (10855, 20435), (11189, 19825)]