18205990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{281}}^1$

素因数の和:349

約数の個数: 64

約数和(自身を含む): 38983680

約数和(自身を除く): 20777690

約数列:

[1, 2, 5, 10, 11, 19, 22, 31, 38, 55, 62, 95, 110, 155, 190, 209, 281, 310, 341, 418, 562, 589, 682, 1045, 1178, 1405, 1705, 2090, 2810, 2945, 3091, 3410, 5339, 5890, 6182, 6479, 8711, 10678, 12958, 15455, 17422, 26695, 30910, 32395, 43555, 53390, 58729, 64790, 87110, 95821, 117458, 165509, 191642, 293645, 331018, 479105, 587290, 827545, 958210, 1655090, 1820599, 3641198, 9102995, 18205990]

約数ペア:

[(1, 18205990), (2, 9102995), (5, 3641198), (10, 1820599), (11, 1655090), (19, 958210), (22, 827545), (31, 587290), (38, 479105), (55, 331018), (62, 293645), (95, 191642), (110, 165509), (155, 117458), (190, 95821), (209, 87110), (281, 64790), (310, 58729), (341, 53390), (418, 43555), (562, 32395), (589, 30910), (682, 26695), (1045, 17422), (1178, 15455), (1405, 12958), (1705, 10678), (2090, 8711), (2810, 6479), (2945, 6182), (3091, 5890), (3410, 5339)]