21807725

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1481}}^1$

素因数の和:1541

約数の個数: 24

約数和(自身を含む): 29402880

約数和(自身を除く): 7595155

約数列:

[1, 5, 19, 25, 31, 95, 155, 475, 589, 775, 1481, 2945, 7405, 14725, 28139, 37025, 45911, 140695, 229555, 703475, 872309, 1147775, 4361545, 21807725]

約数ペア:

[(1, 21807725), (5, 4361545), (19, 1147775), (25, 872309), (31, 703475), (95, 229555), (155, 140695), (475, 45911), (589, 37025), (775, 28139), (1481, 14725), (2945, 7405)]