20453225

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{103}}^1$

素因数の和:186

約数の個数: 36

約数和(自身を含む): 28319616

約数和(自身を除く): 7866391

約数列:

[1, 5, 13, 25, 47, 65, 103, 169, 235, 325, 515, 611, 845, 1175, 1339, 2575, 3055, 4225, 4841, 6695, 7943, 15275, 17407, 24205, 33475, 39715, 62933, 87035, 121025, 198575, 314665, 435175, 818129, 1573325, 4090645, 20453225]

約数ペア:

[(1, 20453225), (5, 4090645), (13, 1573325), (25, 818129), (47, 435175), (65, 314665), (103, 198575), (169, 121025), (235, 87035), (325, 62933), (515, 39715), (611, 33475), (845, 24205), (1175, 17407), (1339, 15275), (2575, 7943), (3055, 6695), (4225, 4841)]