20780520

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1103}}^1$

素因数の和:1274

約数の個数: 64

約数和(自身を含む): 62795520

約数和(自身を除く): 42015000

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 157, 314, 471, 628, 785, 942, 1103, 1256, 1570, 1884, 2206, 2355, 3140, 3309, 3768, 4412, 4710, 5515, 6280, 6618, 8824, 9420, 11030, 13236, 16545, 18840, 22060, 26472, 33090, 44120, 66180, 132360, 173171, 346342, 519513, 692684, 865855, 1039026, 1385368, 1731710, 2078052, 2597565, 3463420, 4156104, 5195130, 6926840, 10390260, 20780520]

約数ペア:

[(1, 20780520), (2, 10390260), (3, 6926840), (4, 5195130), (5, 4156104), (6, 3463420), (8, 2597565), (10, 2078052), (12, 1731710), (15, 1385368), (20, 1039026), (24, 865855), (30, 692684), (40, 519513), (60, 346342), (120, 173171), (157, 132360), (314, 66180), (471, 44120), (628, 33090), (785, 26472), (942, 22060), (1103, 18840), (1256, 16545), (1570, 13236), (1884, 11030), (2206, 9420), (2355, 8824), (3140, 6618), (3309, 6280), (3768, 5515), (4412, 4710)]