20157920

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7411}}^1$

素因数の和:7443

約数の個数: 48

約数和(自身を含む): 50431248

約数和(自身を除く): 30273328

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, 7411, 14822, 29644, 37055, 59288, 74110, 118576, 125987, 148220, 237152, 251974, 296440, 503948, 592880, 629935, 1007896, 1185760, 1259870, 2015792, 2519740, 4031584, 5039480, 10078960, 20157920]

約数ペア:

[(1, 20157920), (2, 10078960), (4, 5039480), (5, 4031584), (8, 2519740), (10, 2015792), (16, 1259870), (17, 1185760), (20, 1007896), (32, 629935), (34, 592880), (40, 503948), (68, 296440), (80, 251974), (85, 237152), (136, 148220), (160, 125987), (170, 118576), (272, 74110), (340, 59288), (544, 37055), (680, 29644), (1360, 14822), (2720, 7411)]