18042020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{601}}^1$

素因数の和:708

約数の個数: 48

約数和(自身を含む): 40454400

約数和(自身を除く): 22412380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 79, 95, 158, 190, 316, 380, 395, 601, 790, 1202, 1501, 1580, 2404, 3002, 3005, 6004, 6010, 7505, 11419, 12020, 15010, 22838, 30020, 45676, 47479, 57095, 94958, 114190, 189916, 228380, 237395, 474790, 902101, 949580, 1804202, 3608404, 4510505, 9021010, 18042020]

約数ペア:

[(1, 18042020), (2, 9021010), (4, 4510505), (5, 3608404), (10, 1804202), (19, 949580), (20, 902101), (38, 474790), (76, 237395), (79, 228380), (95, 189916), (158, 114190), (190, 94958), (316, 57095), (380, 47479), (395, 45676), (601, 30020), (790, 22838), (1202, 15010), (1501, 12020), (1580, 11419), (2404, 7505), (3002, 6010), (3005, 6004)]