20809904

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{76507}}^1$

素因数の和:76532

約数の個数: 20

約数和(自身を含む): 42691464

約数和(自身を除く): 21881560

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 76507, 153014, 306028, 612056, 1224112, 1300619, 2601238, 5202476, 10404952, 20809904]

約数ペア:

[(1, 20809904), (2, 10404952), (4, 5202476), (8, 2601238), (16, 1300619), (17, 1224112), (34, 612056), (68, 306028), (136, 153014), (272, 76507)]