21153625

素因数分解:

$5^3\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1$

素因数の和:202

約数の個数: 32

約数和(自身を含む): 28035072

約数和(自身を除く): 6881447

約数列:

[1, 5, 25, 31, 53, 103, 125, 155, 265, 515, 775, 1325, 1643, 2575, 3193, 3875, 5459, 6625, 8215, 12875, 15965, 27295, 41075, 79825, 136475, 169229, 205375, 399125, 682375, 846145, 4230725, 21153625]

約数ペア:

[(1, 21153625), (5, 4230725), (25, 846145), (31, 682375), (53, 399125), (103, 205375), (125, 169229), (155, 136475), (265, 79825), (515, 41075), (775, 27295), (1325, 15965), (1643, 12875), (2575, 8215), (3193, 6625), (3875, 5459)]