19559975

素因数分解:

$5^2\times {\mathrm{59}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:307

約数の個数: 24

約数和(自身を含む): 25110000

約数和(自身を除く): 5550025

約数列:

[1, 5, 25, 59, 89, 149, 295, 445, 745, 1475, 2225, 3725, 5251, 8791, 13261, 26255, 43955, 66305, 131275, 219775, 331525, 782399, 3911995, 19559975]

約数ペア:

[(1, 19559975), (5, 3911995), (25, 782399), (59, 331525), (89, 219775), (149, 131275), (295, 66305), (445, 43955), (745, 26255), (1475, 13261), (2225, 8791), (3725, 5251)]