18690650

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1999}}^1$

素因数の和:2039

約数の個数: 48

約数和(自身を含む): 40176000

約数和(自身を除く): 21485350

約数列:

[1, 2, 5, 10, 11, 17, 22, 25, 34, 50, 55, 85, 110, 170, 187, 275, 374, 425, 550, 850, 935, 1870, 1999, 3998, 4675, 9350, 9995, 19990, 21989, 33983, 43978, 49975, 67966, 99950, 109945, 169915, 219890, 339830, 373813, 549725, 747626, 849575, 1099450, 1699150, 1869065, 3738130, 9345325, 18690650]

約数ペア:

[(1, 18690650), (2, 9345325), (5, 3738130), (10, 1869065), (11, 1699150), (17, 1099450), (22, 849575), (25, 747626), (34, 549725), (50, 373813), (55, 339830), (85, 219890), (110, 169915), (170, 109945), (187, 99950), (275, 67966), (374, 49975), (425, 43978), (550, 33983), (850, 21989), (935, 19990), (1870, 9995), (1999, 9350), (3998, 4675)]