19919020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8231}}^1$

素因数の和:8262

約数の個数: 36

約数和(自身を含む): 45983952

約数和(自身を除く): 26064932

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8231, 16462, 32924, 41155, 82310, 90541, 164620, 181082, 362164, 452705, 905410, 995951, 1810820, 1991902, 3983804, 4979755, 9959510, 19919020]

約数ペア:

[(1, 19919020), (2, 9959510), (4, 4979755), (5, 3983804), (10, 1991902), (11, 1810820), (20, 995951), (22, 905410), (44, 452705), (55, 362164), (110, 181082), (121, 164620), (220, 90541), (242, 82310), (484, 41155), (605, 32924), (1210, 16462), (2420, 8231)]