20621080

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{631}}^1$

素因数の和:704

約数の個数: 64

約数和(自身を含む): 50054400

約数和(自身を除く): 29433320

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 43, 76, 86, 95, 152, 172, 190, 215, 344, 380, 430, 631, 760, 817, 860, 1262, 1634, 1720, 2524, 3155, 3268, 4085, 5048, 6310, 6536, 8170, 11989, 12620, 16340, 23978, 25240, 27133, 32680, 47956, 54266, 59945, 95912, 108532, 119890, 135665, 217064, 239780, 271330, 479560, 515527, 542660, 1031054, 1085320, 2062108, 2577635, 4124216, 5155270, 10310540, 20621080]

約数ペア:

[(1, 20621080), (2, 10310540), (4, 5155270), (5, 4124216), (8, 2577635), (10, 2062108), (19, 1085320), (20, 1031054), (38, 542660), (40, 515527), (43, 479560), (76, 271330), (86, 239780), (95, 217064), (152, 135665), (172, 119890), (190, 108532), (215, 95912), (344, 59945), (380, 54266), (430, 47956), (631, 32680), (760, 27133), (817, 25240), (860, 23978), (1262, 16340), (1634, 12620), (1720, 11989), (2524, 8170), (3155, 6536), (3268, 6310), (4085, 5048)]