18221420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{829}}^1$

素因数の和:1002

約数の個数: 48

約数和(自身を含む): 44063040

約数和(自身を除く): 25841620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157, 314, 628, 785, 829, 1099, 1570, 1658, 2198, 3140, 3316, 4145, 4396, 5495, 5803, 8290, 10990, 11606, 16580, 21980, 23212, 29015, 58030, 116060, 130153, 260306, 520612, 650765, 911071, 1301530, 1822142, 2603060, 3644284, 4555355, 9110710, 18221420]

約数ペア:

[(1, 18221420), (2, 9110710), (4, 4555355), (5, 3644284), (7, 2603060), (10, 1822142), (14, 1301530), (20, 911071), (28, 650765), (35, 520612), (70, 260306), (140, 130153), (157, 116060), (314, 58030), (628, 29015), (785, 23212), (829, 21980), (1099, 16580), (1570, 11606), (1658, 10990), (2198, 8290), (3140, 5803), (3316, 5495), (4145, 4396)]