20453975

素因数分解:

$5^2\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{149}}^1$

素因数の和:212

約数の個数: 36

約数和(自身を含む): 28551000

約数和(自身を除く): 8097025

約数列:

[1, 5, 17, 19, 25, 85, 95, 149, 289, 323, 425, 475, 745, 1445, 1615, 2533, 2831, 3725, 5491, 7225, 8075, 12665, 14155, 27455, 43061, 48127, 63325, 70775, 137275, 215305, 240635, 818159, 1076525, 1203175, 4090795, 20453975]

約数ペア:

[(1, 20453975), (5, 4090795), (17, 1203175), (19, 1076525), (25, 818159), (85, 240635), (95, 215305), (149, 137275), (289, 70775), (323, 63325), (425, 48127), (475, 43061), (745, 27455), (1445, 14155), (1615, 12665), (2533, 8075), (2831, 7225), (3725, 5491)]