81139555

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1$

素因数の和:196

約数の個数: 64

約数和(自身を含む): 125411328

約数和(自身を除く): 44271773

約数列:

[1, 5, 7, 17, 31, 35, 53, 83, 85, 119, 155, 217, 265, 371, 415, 527, 581, 595, 901, 1085, 1411, 1643, 1855, 2573, 2635, 2905, 3689, 4399, 4505, 6307, 7055, 8215, 9877, 11501, 12865, 18011, 18445, 21995, 27931, 30793, 31535, 43741, 49385, 57505, 74783, 90055, 136369, 139655, 153965, 195517, 218705, 306187, 373915, 523481, 681845, 954583, 977585, 1530935, 2318273, 2617405, 4772915, 11591365, 16227911, 81139555]

約数ペア:

[(1, 81139555), (5, 16227911), (7, 11591365), (17, 4772915), (31, 2617405), (35, 2318273), (53, 1530935), (83, 977585), (85, 954583), (119, 681845), (155, 523481), (217, 373915), (265, 306187), (371, 218705), (415, 195517), (527, 153965), (581, 139655), (595, 136369), (901, 90055), (1085, 74783), (1411, 57505), (1643, 49385), (1855, 43741), (2573, 31535), (2635, 30793), (2905, 27931), (3689, 21995), (4399, 18445), (4505, 18011), (6307, 12865), (7055, 11501), (8215, 9877)]