20978571

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:219

約数の個数: 32

約数和(自身を含む): 30355200

約数和(自身を除く): 9376629

約数列:

[1, 3, 29, 59, 61, 67, 87, 177, 183, 201, 1711, 1769, 1943, 3599, 3953, 4087, 5133, 5307, 5829, 10797, 11859, 12261, 104371, 114637, 118523, 241133, 313113, 343911, 355569, 723399, 6992857, 20978571]

約数ペア:

[(1, 20978571), (3, 6992857), (29, 723399), (59, 355569), (61, 343911), (67, 313113), (87, 241133), (177, 118523), (183, 114637), (201, 104371), (1711, 12261), (1769, 11859), (1943, 10797), (3599, 5829), (3953, 5307), (4087, 5133)]