80888990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{863}}^1$

素因数の和:993

約数の個数: 64

約数和(自身を含む): 181149696

約数和(自身を除く): 100260706

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 91, 103, 130, 182, 206, 455, 515, 721, 863, 910, 1030, 1339, 1442, 1726, 2678, 3605, 4315, 6041, 6695, 7210, 8630, 9373, 11219, 12082, 13390, 18746, 22438, 30205, 46865, 56095, 60410, 78533, 88889, 93730, 112190, 157066, 177778, 392665, 444445, 622223, 785330, 888890, 1155557, 1244446, 2311114, 3111115, 5777785, 6222230, 8088899, 11555570, 16177798, 40444495, 80888990]

約数ペア:

[(1, 80888990), (2, 40444495), (5, 16177798), (7, 11555570), (10, 8088899), (13, 6222230), (14, 5777785), (26, 3111115), (35, 2311114), (65, 1244446), (70, 1155557), (91, 888890), (103, 785330), (130, 622223), (182, 444445), (206, 392665), (455, 177778), (515, 157066), (721, 112190), (863, 93730), (910, 88889), (1030, 78533), (1339, 60410), (1442, 56095), (1726, 46865), (2678, 30205), (3605, 22438), (4315, 18746), (6041, 13390), (6695, 12082), (7210, 11219), (8630, 9373)]