18394540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{293}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 40205088

約数和(自身を除く): 21810548

約数列:

[1, 2, 4, 5, 10, 20, 43, 73, 86, 146, 172, 215, 292, 293, 365, 430, 586, 730, 860, 1172, 1460, 1465, 2930, 3139, 5860, 6278, 12556, 12599, 15695, 21389, 25198, 31390, 42778, 50396, 62780, 62995, 85556, 106945, 125990, 213890, 251980, 427780, 919727, 1839454, 3678908, 4598635, 9197270, 18394540]

約数ペア:

[(1, 18394540), (2, 9197270), (4, 4598635), (5, 3678908), (10, 1839454), (20, 919727), (43, 427780), (73, 251980), (86, 213890), (146, 125990), (172, 106945), (215, 85556), (292, 62995), (293, 62780), (365, 50396), (430, 42778), (586, 31390), (730, 25198), (860, 21389), (1172, 15695), (1460, 12599), (1465, 12556), (2930, 6278), (3139, 5860)]