19998580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{677}}^1$

素因数の和:904

約数の個数: 48

約数和(自身を含む): 48295296

約数和(自身を除く): 28296716

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 211, 422, 677, 844, 1055, 1354, 1477, 2110, 2708, 2954, 3385, 4220, 4739, 5908, 6770, 7385, 9478, 13540, 14770, 18956, 23695, 29540, 47390, 94780, 142847, 285694, 571388, 714235, 999929, 1428470, 1999858, 2856940, 3999716, 4999645, 9999290, 19998580]

約数ペア:

[(1, 19998580), (2, 9999290), (4, 4999645), (5, 3999716), (7, 2856940), (10, 1999858), (14, 1428470), (20, 999929), (28, 714235), (35, 571388), (70, 285694), (140, 142847), (211, 94780), (422, 47390), (677, 29540), (844, 23695), (1055, 18956), (1354, 14770), (1477, 13540), (2110, 9478), (2708, 7385), (2954, 6770), (3385, 5908), (4220, 4739)]