21264295

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:283

約数の個数: 32

約数和(自身を含む): 28998144

約数和(自身を除く): 7733849

約数列:

[1, 5, 13, 31, 61, 65, 155, 173, 305, 403, 793, 865, 1891, 2015, 2249, 3965, 5363, 9455, 10553, 11245, 24583, 26815, 52765, 69719, 122915, 137189, 327143, 348595, 685945, 1635715, 4252859, 21264295]

約数ペア:

[(1, 21264295), (5, 4252859), (13, 1635715), (31, 685945), (61, 348595), (65, 327143), (155, 137189), (173, 122915), (305, 69719), (403, 52765), (793, 26815), (865, 24583), (1891, 11245), (2015, 10553), (2249, 9455), (3965, 5363)]