18700780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{599}}^1$

素因数の和:838

約数の個数: 48

約数和(自身を含む): 45158400

約数和(自身を除く): 26457620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 223, 446, 599, 892, 1115, 1198, 1561, 2230, 2396, 2995, 3122, 4193, 4460, 5990, 6244, 7805, 8386, 11980, 15610, 16772, 20965, 31220, 41930, 83860, 133577, 267154, 534308, 667885, 935039, 1335770, 1870078, 2671540, 3740156, 4675195, 9350390, 18700780]

約数ペア:

[(1, 18700780), (2, 9350390), (4, 4675195), (5, 3740156), (7, 2671540), (10, 1870078), (14, 1335770), (20, 935039), (28, 667885), (35, 534308), (70, 267154), (140, 133577), (223, 83860), (446, 41930), (599, 31220), (892, 20965), (1115, 16772), (1198, 15610), (1561, 11980), (2230, 8386), (2396, 7805), (2995, 6244), (3122, 5990), (4193, 4460)]