18965180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:247

約数の個数: 72

約数和(自身を含む): 44763264

約数和(自身を除く): 25798084

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 169, 181, 260, 310, 338, 362, 403, 620, 676, 724, 806, 845, 905, 1612, 1690, 1810, 2015, 2353, 3380, 3620, 4030, 4706, 5239, 5611, 8060, 9412, 10478, 11222, 11765, 20956, 22444, 23530, 26195, 28055, 30589, 47060, 52390, 56110, 61178, 72943, 104780, 112220, 122356, 145886, 152945, 291772, 305890, 364715, 611780, 729430, 948259, 1458860, 1896518, 3793036, 4741295, 9482590, 18965180]

約数ペア:

[(1, 18965180), (2, 9482590), (4, 4741295), (5, 3793036), (10, 1896518), (13, 1458860), (20, 948259), (26, 729430), (31, 611780), (52, 364715), (62, 305890), (65, 291772), (124, 152945), (130, 145886), (155, 122356), (169, 112220), (181, 104780), (260, 72943), (310, 61178), (338, 56110), (362, 52390), (403, 47060), (620, 30589), (676, 28055), (724, 26195), (806, 23530), (845, 22444), (905, 20956), (1612, 11765), (1690, 11222), (1810, 10478), (2015, 9412), (2353, 8060), (3380, 5611), (3620, 5239), (4030, 4706)]