21990518186

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{71453}}^1$

素因数の和:71583

約数の個数: 64

約数和(自身を含む): 43215379200

約数和(自身を除く): 21224861014

約数列:

[1, 2, 7, 13, 14, 19, 26, 38, 89, 91, 133, 178, 182, 247, 266, 494, 623, 1157, 1246, 1691, 1729, 2314, 3382, 3458, 8099, 11837, 16198, 21983, 23674, 43966, 71453, 142906, 153881, 307762, 500171, 928889, 1000342, 1357607, 1857778, 2715214, 6359317, 6502223, 9503249, 12718634, 13004446, 17648891, 19006498, 35297782, 44515219, 82671121, 89030438, 120827023, 123542237, 165342242, 241654046, 247084474, 578697847, 845789161, 1157395694, 1570751299, 1691578322, 3141502598, 10995259093, 21990518186]

約数ペア:

[(1, 21990518186), (2, 10995259093), (7, 3141502598), (13, 1691578322), (14, 1570751299), (19, 1157395694), (26, 845789161), (38, 578697847), (89, 247084474), (91, 241654046), (133, 165342242), (178, 123542237), (182, 120827023), (247, 89030438), (266, 82671121), (494, 44515219), (623, 35297782), (1157, 19006498), (1246, 17648891), (1691, 13004446), (1729, 12718634), (2314, 9503249), (3382, 6502223), (3458, 6359317), (8099, 2715214), (11837, 1857778), (16198, 1357607), (21983, 1000342), (23674, 928889), (43966, 500171), (71453, 307762), (142906, 153881)]