21048225

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{823}}^1$

素因数の和:878

約数の個数: 48

約数和(自身を含む): 39235584

約数和(自身を除く): 18187359

約数列:

[1, 3, 5, 11, 15, 25, 31, 33, 55, 75, 93, 155, 165, 275, 341, 465, 775, 823, 825, 1023, 1705, 2325, 2469, 4115, 5115, 8525, 9053, 12345, 20575, 25513, 25575, 27159, 45265, 61725, 76539, 127565, 135795, 226325, 280643, 382695, 637825, 678975, 841929, 1403215, 1913475, 4209645, 7016075, 21048225]

約数ペア:

[(1, 21048225), (3, 7016075), (5, 4209645), (11, 1913475), (15, 1403215), (25, 841929), (31, 678975), (33, 637825), (55, 382695), (75, 280643), (93, 226325), (155, 135795), (165, 127565), (275, 76539), (341, 61725), (465, 45265), (775, 27159), (823, 25575), (825, 25513), (1023, 20575), (1705, 12345), (2325, 9053), (2469, 8525), (4115, 5115)]