81327220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{163}}^1$

素因数の和:305

約数の個数: 96

約数和(自身を含む): 196721280

約数和(自身を除く): 115394060

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 101, 130, 163, 190, 202, 247, 260, 326, 380, 404, 494, 505, 652, 815, 988, 1010, 1235, 1313, 1630, 1919, 2020, 2119, 2470, 2626, 3097, 3260, 3838, 4238, 4940, 5252, 6194, 6565, 7676, 8476, 9595, 10595, 12388, 13130, 15485, 16463, 19190, 21190, 24947, 26260, 30970, 32926, 38380, 40261, 42380, 49894, 61940, 65852, 80522, 82315, 99788, 124735, 161044, 164630, 201305, 214019, 249470, 312797, 329260, 402610, 428038, 498940, 625594, 805220, 856076, 1070095, 1251188, 1563985, 2140190, 3127970, 4066361, 4280380, 6255940, 8132722, 16265444, 20331805, 40663610, 81327220]

約数ペア:

[(1, 81327220), (2, 40663610), (4, 20331805), (5, 16265444), (10, 8132722), (13, 6255940), (19, 4280380), (20, 4066361), (26, 3127970), (38, 2140190), (52, 1563985), (65, 1251188), (76, 1070095), (95, 856076), (101, 805220), (130, 625594), (163, 498940), (190, 428038), (202, 402610), (247, 329260), (260, 312797), (326, 249470), (380, 214019), (404, 201305), (494, 164630), (505, 161044), (652, 124735), (815, 99788), (988, 82315), (1010, 80522), (1235, 65852), (1313, 61940), (1630, 49894), (1919, 42380), (2020, 40261), (2119, 38380), (2470, 32926), (2626, 30970), (3097, 26260), (3260, 24947), (3838, 21190), (4238, 19190), (4940, 16463), (5252, 15485), (6194, 13130), (6565, 12388), (7676, 10595), (8476, 9595)]