18161975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:140

約数の個数: 48

約数和(自身を含む): 26248320

約数和(自身を除く): 8086345

約数列:

[1, 5, 13, 25, 29, 41, 47, 65, 145, 205, 235, 325, 377, 533, 611, 725, 1025, 1175, 1189, 1363, 1885, 1927, 2665, 3055, 5945, 6815, 9425, 9635, 13325, 15275, 15457, 17719, 25051, 29725, 34075, 48175, 55883, 77285, 88595, 125255, 279415, 386425, 442975, 626275, 726479, 1397075, 3632395, 18161975]

約数ペア:

[(1, 18161975), (5, 3632395), (13, 1397075), (25, 726479), (29, 626275), (41, 442975), (47, 386425), (65, 279415), (145, 125255), (205, 88595), (235, 77285), (325, 55883), (377, 48175), (533, 34075), (611, 29725), (725, 25051), (1025, 17719), (1175, 15457), (1189, 15275), (1363, 13325), (1885, 9635), (1927, 9425), (2665, 6815), (3055, 5945)]