520940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^2$

素因数の和:138

約数の個数: 36

約数和(自身を含む): 1271088

約数和(自身を除く): 750148

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 122, 140, 244, 305, 427, 610, 854, 1220, 1708, 2135, 3721, 4270, 7442, 8540, 14884, 18605, 26047, 37210, 52094, 74420, 104188, 130235, 260470, 520940]

約数ペア:

[(1, 520940), (2, 260470), (4, 130235), (5, 104188), (7, 74420), (10, 52094), (14, 37210), (20, 26047), (28, 18605), (35, 14884), (61, 8540), (70, 7442), (122, 4270), (140, 3721), (244, 2135), (305, 1708), (427, 1220), (610, 854)]