20857005

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{353}}^1$

素因数の和:478

約数の個数: 48

約数和(自身を含む): 39429936

約数和(自身を除く): 18572931

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 101, 117, 195, 303, 353, 505, 585, 909, 1059, 1313, 1515, 1765, 3177, 3939, 4545, 4589, 5295, 6565, 11817, 13767, 15885, 19695, 22945, 35653, 41301, 59085, 68835, 106959, 178265, 206505, 320877, 463489, 534795, 1390467, 1604385, 2317445, 4171401, 6952335, 20857005]

約数ペア:

[(1, 20857005), (3, 6952335), (5, 4171401), (9, 2317445), (13, 1604385), (15, 1390467), (39, 534795), (45, 463489), (65, 320877), (101, 206505), (117, 178265), (195, 106959), (303, 68835), (353, 59085), (505, 41301), (585, 35653), (909, 22945), (1059, 19695), (1313, 15885), (1515, 13767), (1765, 11817), (3177, 6565), (3939, 5295), (4545, 4589)]