21731440

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^2$

素因数の和:107

約数の個数: 120

約数和(自身を含む): 58322160

約数和(自身を除く): 36590720

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 29, 34, 38, 40, 58, 68, 76, 80, 85, 95, 116, 136, 145, 152, 170, 190, 232, 272, 290, 304, 323, 340, 380, 464, 493, 551, 580, 646, 680, 760, 841, 986, 1102, 1160, 1292, 1360, 1520, 1615, 1682, 1972, 2204, 2320, 2465, 2584, 2755, 3230, 3364, 3944, 4205, 4408, 4930, 5168, 5510, 6460, 6728, 7888, 8410, 8816, 9367, 9860, 11020, 12920, 13456, 14297, 15979, 16820, 18734, 19720, 22040, 25840, 28594, 31958, 33640, 37468, 39440, 44080, 46835, 57188, 63916, 67280, 71485, 74936, 79895, 93670, 114376, 127832, 142970, 149872, 159790, 187340, 228752, 255664, 271643, 285940, 319580, 374680, 543286, 571880, 639160, 749360, 1086572, 1143760, 1278320, 1358215, 2173144, 2716430, 4346288, 5432860, 10865720, 21731440]

約数ペア:

[(1, 21731440), (2, 10865720), (4, 5432860), (5, 4346288), (8, 2716430), (10, 2173144), (16, 1358215), (17, 1278320), (19, 1143760), (20, 1086572), (29, 749360), (34, 639160), (38, 571880), (40, 543286), (58, 374680), (68, 319580), (76, 285940), (80, 271643), (85, 255664), (95, 228752), (116, 187340), (136, 159790), (145, 149872), (152, 142970), (170, 127832), (190, 114376), (232, 93670), (272, 79895), (290, 74936), (304, 71485), (323, 67280), (340, 63916), (380, 57188), (464, 46835), (493, 44080), (551, 39440), (580, 37468), (646, 33640), (680, 31958), (760, 28594), (841, 25840), (986, 22040), (1102, 19720), (1160, 18734), (1292, 16820), (1360, 15979), (1520, 14297), (1615, 13456), (1682, 12920), (1972, 11020), (2204, 9860), (2320, 9367), (2465, 8816), (2584, 8410), (2755, 7888), (3230, 6728), (3364, 6460), (3944, 5510), (4205, 5168), (4408, 4930)]