18054760

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:262

約数の個数: 64

約数和(自身を含む): 42411600

約数和(自身を除く): 24356840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 101, 109, 164, 202, 205, 218, 328, 404, 410, 436, 505, 545, 808, 820, 872, 1010, 1090, 1640, 2020, 2180, 4040, 4141, 4360, 4469, 8282, 8938, 11009, 16564, 17876, 20705, 22018, 22345, 33128, 35752, 41410, 44036, 44690, 55045, 82820, 88072, 89380, 110090, 165640, 178760, 220180, 440360, 451369, 902738, 1805476, 2256845, 3610952, 4513690, 9027380, 18054760]

約数ペア:

[(1, 18054760), (2, 9027380), (4, 4513690), (5, 3610952), (8, 2256845), (10, 1805476), (20, 902738), (40, 451369), (41, 440360), (82, 220180), (101, 178760), (109, 165640), (164, 110090), (202, 89380), (205, 88072), (218, 82820), (328, 55045), (404, 44690), (410, 44036), (436, 41410), (505, 35752), (545, 33128), (808, 22345), (820, 22018), (872, 20705), (1010, 17876), (1090, 16564), (1640, 11009), (2020, 8938), (2180, 8282), (4040, 4469), (4141, 4360)]