21038265

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:223

約数の個数: 64

約数和(自身を含む): 40435200

約数和(自身を除く): 19396935

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 85, 89, 103, 135, 153, 255, 267, 309, 445, 459, 515, 765, 801, 927, 1335, 1513, 1545, 1751, 2295, 2403, 2781, 4005, 4539, 4635, 5253, 7565, 8755, 9167, 12015, 13617, 13905, 15759, 22695, 26265, 27501, 40851, 45835, 47277, 68085, 78795, 82503, 137505, 155839, 204255, 236385, 247509, 412515, 467517, 779195, 1237545, 1402551, 2337585, 4207653, 7012755, 21038265]

約数ペア:

[(1, 21038265), (3, 7012755), (5, 4207653), (9, 2337585), (15, 1402551), (17, 1237545), (27, 779195), (45, 467517), (51, 412515), (85, 247509), (89, 236385), (103, 204255), (135, 155839), (153, 137505), (255, 82503), (267, 78795), (309, 68085), (445, 47277), (459, 45835), (515, 40851), (765, 27501), (801, 26265), (927, 22695), (1335, 15759), (1513, 13905), (1545, 13617), (1751, 12015), (2295, 9167), (2403, 8755), (2781, 7565), (4005, 5253), (4539, 4635)]