20706980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{419}}^1$

素因数の和:788

約数の個数: 48

約数和(自身を含む): 49956480

約数和(自身を除く): 29249500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 353, 419, 706, 838, 1412, 1676, 1765, 2095, 2471, 2933, 3530, 4190, 4942, 5866, 7060, 8380, 9884, 11732, 12355, 14665, 24710, 29330, 49420, 58660, 147907, 295814, 591628, 739535, 1035349, 1479070, 2070698, 2958140, 4141396, 5176745, 10353490, 20706980]

約数ペア:

[(1, 20706980), (2, 10353490), (4, 5176745), (5, 4141396), (7, 2958140), (10, 2070698), (14, 1479070), (20, 1035349), (28, 739535), (35, 591628), (70, 295814), (140, 147907), (353, 58660), (419, 49420), (706, 29330), (838, 24710), (1412, 14665), (1676, 12355), (1765, 11732), (2095, 9884), (2471, 8380), (2933, 7060), (3530, 5866), (4190, 4942)]