18878440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{353}}^1$

素因数の和:562

約数の個数: 64

約数和(自身を含む): 48936960

約数和(自身を除く): 30058520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 191, 280, 353, 382, 706, 764, 955, 1337, 1412, 1528, 1765, 1910, 2471, 2674, 2824, 3530, 3820, 4942, 5348, 6685, 7060, 7640, 9884, 10696, 12355, 13370, 14120, 19768, 24710, 26740, 49420, 53480, 67423, 98840, 134846, 269692, 337115, 471961, 539384, 674230, 943922, 1348460, 1887844, 2359805, 2696920, 3775688, 4719610, 9439220, 18878440]

約数ペア:

[(1, 18878440), (2, 9439220), (4, 4719610), (5, 3775688), (7, 2696920), (8, 2359805), (10, 1887844), (14, 1348460), (20, 943922), (28, 674230), (35, 539384), (40, 471961), (56, 337115), (70, 269692), (140, 134846), (191, 98840), (280, 67423), (353, 53480), (382, 49420), (706, 26740), (764, 24710), (955, 19768), (1337, 14120), (1412, 13370), (1528, 12355), (1765, 10696), (1910, 9884), (2471, 7640), (2674, 7060), (2824, 6685), (3530, 5348), (3820, 4942)]