21855625

素因数分解:

$5^4\times {\mathrm{11}}^2\times {\mathrm{17}}^2$

素因数の和:76

約数の個数: 45

約数和(自身を含む): 31889011

約数和(自身を除く): 10033386

約数列:

[1, 5, 11, 17, 25, 55, 85, 121, 125, 187, 275, 289, 425, 605, 625, 935, 1375, 1445, 2057, 2125, 3025, 3179, 4675, 6875, 7225, 10285, 10625, 15125, 15895, 23375, 34969, 36125, 51425, 75625, 79475, 116875, 174845, 180625, 257125, 397375, 874225, 1285625, 1986875, 4371125, 21855625]

約数ペア:

[(1, 21855625), (5, 4371125), (11, 1986875), (17, 1285625), (25, 874225), (55, 397375), (85, 257125), (121, 180625), (125, 174845), (187, 116875), (275, 79475), (289, 75625), (425, 51425), (605, 36125), (625, 34969), (935, 23375), (1375, 15895), (1445, 15125), (2057, 10625), (2125, 10285), (3025, 7225), (3179, 6875)]