21080280

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13513}}^1$

素因数の和:13540

約数の個数: 64

約数和(自身を含む): 68110560

約数和(自身を除く): 47030280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13513, 27026, 40539, 54052, 67565, 81078, 108104, 135130, 162156, 175669, 202695, 270260, 324312, 351338, 405390, 527007, 540520, 702676, 810780, 878345, 1054014, 1405352, 1621560, 1756690, 2108028, 2635035, 3513380, 4216056, 5270070, 7026760, 10540140, 21080280]

約数ペア:

[(1, 21080280), (2, 10540140), (3, 7026760), (4, 5270070), (5, 4216056), (6, 3513380), (8, 2635035), (10, 2108028), (12, 1756690), (13, 1621560), (15, 1405352), (20, 1054014), (24, 878345), (26, 810780), (30, 702676), (39, 540520), (40, 527007), (52, 405390), (60, 351338), (65, 324312), (78, 270260), (104, 202695), (120, 175669), (130, 162156), (156, 135130), (195, 108104), (260, 81078), (312, 67565), (390, 54052), (520, 40539), (780, 27026), (1560, 13513)]