21872008

素因数分解:

$2^3\times {\mathrm{59}}^1\times {\mathrm{149}}^1\times {\mathrm{311}}^1$

素因数の和:525

約数の個数: 32

約数和(自身を含む): 42120000

約数和(自身を除く): 20247992

約数列:

[1, 2, 4, 8, 59, 118, 149, 236, 298, 311, 472, 596, 622, 1192, 1244, 2488, 8791, 17582, 18349, 35164, 36698, 46339, 70328, 73396, 92678, 146792, 185356, 370712, 2734001, 5468002, 10936004, 21872008]

約数ペア:

[(1, 21872008), (2, 10936004), (4, 5468002), (8, 2734001), (59, 370712), (118, 185356), (149, 146792), (236, 92678), (298, 73396), (311, 70328), (472, 46339), (596, 36698), (622, 35164), (1192, 18349), (1244, 17582), (2488, 8791)]