20533940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{911}}^1$

素因数の和:957

約数の個数: 72

約数和(自身を含む): 52399872

約数和(自身を除く): 31865932

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 140, 161, 196, 230, 245, 322, 460, 490, 644, 805, 911, 980, 1127, 1610, 1822, 2254, 3220, 3644, 4508, 4555, 5635, 6377, 9110, 11270, 12754, 18220, 20953, 22540, 25508, 31885, 41906, 44639, 63770, 83812, 89278, 104765, 127540, 146671, 178556, 209530, 223195, 293342, 419060, 446390, 586684, 733355, 892780, 1026697, 1466710, 2053394, 2933420, 4106788, 5133485, 10266970, 20533940]

約数ペア:

[(1, 20533940), (2, 10266970), (4, 5133485), (5, 4106788), (7, 2933420), (10, 2053394), (14, 1466710), (20, 1026697), (23, 892780), (28, 733355), (35, 586684), (46, 446390), (49, 419060), (70, 293342), (92, 223195), (98, 209530), (115, 178556), (140, 146671), (161, 127540), (196, 104765), (230, 89278), (245, 83812), (322, 63770), (460, 44639), (490, 41906), (644, 31885), (805, 25508), (911, 22540), (980, 20953), (1127, 18220), (1610, 12754), (1822, 11270), (2254, 9110), (3220, 6377), (3644, 5635), (4508, 4555)]