18484220

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{139}}^1$

素因数の和:318

約数の個数: 48

約数和(自身を含む): 40101600

約数和(自身を除く): 21617380

約数列:

[1, 2, 4, 5, 10, 20, 61, 109, 122, 139, 218, 244, 278, 305, 436, 545, 556, 610, 695, 1090, 1220, 1390, 2180, 2780, 6649, 8479, 13298, 15151, 16958, 26596, 30302, 33245, 33916, 42395, 60604, 66490, 75755, 84790, 132980, 151510, 169580, 303020, 924211, 1848422, 3696844, 4621055, 9242110, 18484220]

約数ペア:

[(1, 18484220), (2, 9242110), (4, 4621055), (5, 3696844), (10, 1848422), (20, 924211), (61, 303020), (109, 169580), (122, 151510), (139, 132980), (218, 84790), (244, 75755), (278, 66490), (305, 60604), (436, 42395), (545, 33916), (556, 33245), (610, 30302), (695, 26596), (1090, 16958), (1220, 15151), (1390, 13298), (2180, 8479), (2780, 6649)]