20121840

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{27947}}^1$

素因数の和:27966

約数の個数: 60

約数和(自身を含む): 67578264

約数和(自身を除く): 47456424

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720, 27947, 55894, 83841, 111788, 139735, 167682, 223576, 251523, 279470, 335364, 419205, 447152, 503046, 558940, 670728, 838410, 1006092, 1117880, 1257615, 1341456, 1676820, 2012184, 2235760, 2515230, 3353640, 4024368, 5030460, 6707280, 10060920, 20121840]

約数ペア:

[(1, 20121840), (2, 10060920), (3, 6707280), (4, 5030460), (5, 4024368), (6, 3353640), (8, 2515230), (9, 2235760), (10, 2012184), (12, 1676820), (15, 1341456), (16, 1257615), (18, 1117880), (20, 1006092), (24, 838410), (30, 670728), (36, 558940), (40, 503046), (45, 447152), (48, 419205), (60, 335364), (72, 279470), (80, 251523), (90, 223576), (120, 167682), (144, 139735), (180, 111788), (240, 83841), (360, 55894), (720, 27947)]