21058115

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:239

約数の個数: 32

約数和(自身を含む): 28498176

約数和(自身を除く): 7440061

約数列:

[1, 5, 13, 47, 61, 65, 113, 235, 305, 565, 611, 793, 1469, 2867, 3055, 3965, 5311, 6893, 7345, 14335, 26555, 34465, 37271, 69043, 89609, 186355, 323971, 345215, 448045, 1619855, 4211623, 21058115]

約数ペア:

[(1, 21058115), (5, 4211623), (13, 1619855), (47, 448045), (61, 345215), (65, 323971), (113, 186355), (235, 89609), (305, 69043), (565, 37271), (611, 34465), (793, 26555), (1469, 14335), (2867, 7345), (3055, 6893), (3965, 5311)]