79780010

素因数分解:

$2^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{20509}}^1$

素因数の和:20905

約数の個数: 16

約数和(自身を含む): 143980200

約数和(自身を除く): 64200190

約数列:

[1, 2, 5, 10, 389, 778, 1945, 3890, 20509, 41018, 102545, 205090, 7978001, 15956002, 39890005, 79780010]

約数ペア:

[(1, 79780010), (2, 39890005), (5, 15956002), (10, 7978001), (389, 205090), (778, 102545), (1945, 41018), (3890, 20509)]