20717968

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{1291}}^1$

素因数の和:1375

約数の個数: 40

約数和(自身を含む): 43256160

約数和(自身を除く): 22538192

約数列:

[1, 2, 4, 8, 16, 17, 34, 59, 68, 118, 136, 236, 272, 472, 944, 1003, 1291, 2006, 2582, 4012, 5164, 8024, 10328, 16048, 20656, 21947, 43894, 76169, 87788, 152338, 175576, 304676, 351152, 609352, 1218704, 1294873, 2589746, 5179492, 10358984, 20717968]

約数ペア:

[(1, 20717968), (2, 10358984), (4, 5179492), (8, 2589746), (16, 1294873), (17, 1218704), (34, 609352), (59, 351152), (68, 304676), (118, 175576), (136, 152338), (236, 87788), (272, 76169), (472, 43894), (944, 21947), (1003, 20656), (1291, 16048), (2006, 10328), (2582, 8024), (4012, 5164)]