21319425

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{4987}}^1$

素因数の和:5022

約数の個数: 36

約数和(自身を含む): 40203280

約数和(自身を除く): 18883855

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 75, 95, 171, 225, 285, 475, 855, 1425, 4275, 4987, 14961, 24935, 44883, 74805, 94753, 124675, 224415, 284259, 374025, 473765, 852777, 1122075, 1421295, 2368825, 4263885, 7106475, 21319425]

約数ペア:

[(1, 21319425), (3, 7106475), (5, 4263885), (9, 2368825), (15, 1421295), (19, 1122075), (25, 852777), (45, 473765), (57, 374025), (75, 284259), (95, 224415), (171, 124675), (225, 94753), (285, 74805), (475, 44883), (855, 24935), (1425, 14961), (4275, 4987)]