18620840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{911}}^1$

素因数の和:1002

約数の個数: 64

約数和(自身を含む): 48591360

約数和(自身を除く): 29970520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 73, 140, 146, 280, 292, 365, 511, 584, 730, 911, 1022, 1460, 1822, 2044, 2555, 2920, 3644, 4088, 4555, 5110, 6377, 7288, 9110, 10220, 12754, 18220, 20440, 25508, 31885, 36440, 51016, 63770, 66503, 127540, 133006, 255080, 266012, 332515, 465521, 532024, 665030, 931042, 1330060, 1862084, 2327605, 2660120, 3724168, 4655210, 9310420, 18620840]

約数ペア:

[(1, 18620840), (2, 9310420), (4, 4655210), (5, 3724168), (7, 2660120), (8, 2327605), (10, 1862084), (14, 1330060), (20, 931042), (28, 665030), (35, 532024), (40, 465521), (56, 332515), (70, 266012), (73, 255080), (140, 133006), (146, 127540), (280, 66503), (292, 63770), (365, 51016), (511, 36440), (584, 31885), (730, 25508), (911, 20440), (1022, 18220), (1460, 12754), (1822, 10220), (2044, 9110), (2555, 7288), (2920, 6377), (3644, 5110), (4088, 4555)]