20907920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1033}}^1$

素因数の和:1080

約数の個数: 80

約数和(自身を含む): 55389312

約数和(自身を除く): 34481392

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 23, 40, 44, 46, 55, 80, 88, 92, 110, 115, 176, 184, 220, 230, 253, 368, 440, 460, 506, 880, 920, 1012, 1033, 1265, 1840, 2024, 2066, 2530, 4048, 4132, 5060, 5165, 8264, 10120, 10330, 11363, 16528, 20240, 20660, 22726, 23759, 41320, 45452, 47518, 56815, 82640, 90904, 95036, 113630, 118795, 181808, 190072, 227260, 237590, 261349, 380144, 454520, 475180, 522698, 909040, 950360, 1045396, 1306745, 1900720, 2090792, 2613490, 4181584, 5226980, 10453960, 20907920]

約数ペア:

[(1, 20907920), (2, 10453960), (4, 5226980), (5, 4181584), (8, 2613490), (10, 2090792), (11, 1900720), (16, 1306745), (20, 1045396), (22, 950360), (23, 909040), (40, 522698), (44, 475180), (46, 454520), (55, 380144), (80, 261349), (88, 237590), (92, 227260), (110, 190072), (115, 181808), (176, 118795), (184, 113630), (220, 95036), (230, 90904), (253, 82640), (368, 56815), (440, 47518), (460, 45452), (506, 41320), (880, 23759), (920, 22726), (1012, 20660), (1033, 20240), (1265, 16528), (1840, 11363), (2024, 10330), (2066, 10120), (2530, 8264), (4048, 5165), (4132, 5060)]