20388940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{7129}}^1$

素因数の和:7162

約数の個数: 48

約数和(自身を含む): 50309280

約数和(自身を除く): 29920340

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 7129, 14258, 28516, 35645, 71290, 78419, 92677, 142580, 156838, 185354, 313676, 370708, 392095, 463385, 784190, 926770, 1019447, 1568380, 1853540, 2038894, 4077788, 5097235, 10194470, 20388940]

約数ペア:

[(1, 20388940), (2, 10194470), (4, 5097235), (5, 4077788), (10, 2038894), (11, 1853540), (13, 1568380), (20, 1019447), (22, 926770), (26, 784190), (44, 463385), (52, 392095), (55, 370708), (65, 313676), (110, 185354), (130, 156838), (143, 142580), (220, 92677), (260, 78419), (286, 71290), (572, 35645), (715, 28516), (1430, 14258), (2860, 7129)]