81719120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1999}}^1$

素因数の和:2092

約数の個数: 80

約数和(自身を含む): 220224000

約数和(自身を除く): 138504880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 73, 80, 112, 140, 146, 280, 292, 365, 511, 560, 584, 730, 1022, 1168, 1460, 1999, 2044, 2555, 2920, 3998, 4088, 5110, 5840, 7996, 8176, 9995, 10220, 13993, 15992, 19990, 20440, 27986, 31984, 39980, 40880, 55972, 69965, 79960, 111944, 139930, 145927, 159920, 223888, 279860, 291854, 559720, 583708, 729635, 1021489, 1119440, 1167416, 1459270, 2042978, 2334832, 2918540, 4085956, 5107445, 5837080, 8171912, 10214890, 11674160, 16343824, 20429780, 40859560, 81719120]

約数ペア:

[(1, 81719120), (2, 40859560), (4, 20429780), (5, 16343824), (7, 11674160), (8, 10214890), (10, 8171912), (14, 5837080), (16, 5107445), (20, 4085956), (28, 2918540), (35, 2334832), (40, 2042978), (56, 1459270), (70, 1167416), (73, 1119440), (80, 1021489), (112, 729635), (140, 583708), (146, 559720), (280, 291854), (292, 279860), (365, 223888), (511, 159920), (560, 145927), (584, 139930), (730, 111944), (1022, 79960), (1168, 69965), (1460, 55972), (1999, 40880), (2044, 39980), (2555, 31984), (2920, 27986), (3998, 20440), (4088, 19990), (5110, 15992), (5840, 13993), (7996, 10220), (8176, 9995)]