21013785

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2113}}^1$

素因数の和:2154

約数の個数: 48

約数和(自身を含む): 41552784

約数和(自身を除く): 20538999

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 45, 51, 65, 85, 117, 153, 195, 221, 255, 585, 663, 765, 1105, 1989, 2113, 3315, 6339, 9945, 10565, 19017, 27469, 31695, 35921, 82407, 95085, 107763, 137345, 179605, 247221, 323289, 412035, 466973, 538815, 1236105, 1400919, 1616445, 2334865, 4202757, 7004595, 21013785]

約数ペア:

[(1, 21013785), (3, 7004595), (5, 4202757), (9, 2334865), (13, 1616445), (15, 1400919), (17, 1236105), (39, 538815), (45, 466973), (51, 412035), (65, 323289), (85, 247221), (117, 179605), (153, 137345), (195, 107763), (221, 95085), (255, 82407), (585, 35921), (663, 31695), (765, 27469), (1105, 19017), (1989, 10565), (2113, 9945), (3315, 6339)]