21500520

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1289}}^1$

素因数の和:1442

約数の個数: 64

約数和(自身を含む): 65016000

約数和(自身を除く): 43515480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 139, 278, 417, 556, 695, 834, 1112, 1289, 1390, 1668, 2085, 2578, 2780, 3336, 3867, 4170, 5156, 5560, 6445, 7734, 8340, 10312, 12890, 15468, 16680, 19335, 25780, 30936, 38670, 51560, 77340, 154680, 179171, 358342, 537513, 716684, 895855, 1075026, 1433368, 1791710, 2150052, 2687565, 3583420, 4300104, 5375130, 7166840, 10750260, 21500520]

約数ペア:

[(1, 21500520), (2, 10750260), (3, 7166840), (4, 5375130), (5, 4300104), (6, 3583420), (8, 2687565), (10, 2150052), (12, 1791710), (15, 1433368), (20, 1075026), (24, 895855), (30, 716684), (40, 537513), (60, 358342), (120, 179171), (139, 154680), (278, 77340), (417, 51560), (556, 38670), (695, 30936), (834, 25780), (1112, 19335), (1289, 16680), (1390, 15468), (1668, 12890), (2085, 10312), (2578, 8340), (2780, 7734), (3336, 6445), (3867, 5560), (4170, 5156)]