20913789

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:285

約数の個数: 32

約数和(自身を含む): 31248000

約数和(自身を除く): 10334211

約数列:

[1, 3, 13, 39, 59, 61, 149, 177, 183, 447, 767, 793, 1937, 2301, 2379, 3599, 5811, 8791, 9089, 10797, 26373, 27267, 46787, 114283, 118157, 140361, 342849, 354471, 536251, 1608753, 6971263, 20913789]

約数ペア:

[(1, 20913789), (3, 6971263), (13, 1608753), (39, 536251), (59, 354471), (61, 342849), (149, 140361), (177, 118157), (183, 114283), (447, 46787), (767, 27267), (793, 26373), (1937, 10797), (2301, 9089), (2379, 8791), (3599, 5811)]