18797920

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{6911}}^1$

素因数の和:6943

約数の個数: 48

約数和(自身を含む): 47029248

約数和(自身を除く): 28231328

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 6911, 13822, 27644, 34555, 55288, 69110, 110576, 117487, 138220, 221152, 234974, 276440, 469948, 552880, 587435, 939896, 1105760, 1174870, 1879792, 2349740, 3759584, 4699480, 9398960, 18797920]

約数ペア:

[(1, 18797920), (2, 9398960), (4, 4699480), (5, 3759584), (8, 2349740), (10, 1879792), (16, 1174870), (17, 1105760), (20, 939896), (32, 587435), (34, 552880), (40, 469948), (68, 276440), (80, 234974), (85, 221152), (136, 138220), (160, 117487), (170, 110576), (272, 69110), (340, 55288), (544, 34555), (680, 27644), (1360, 13822), (2720, 6911)]