21541960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{283}}^1$

素因数の和:478

約数の個数: 64

約数和(自身を含む): 53369280

約数和(自身を除く): 31827320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 173, 220, 283, 346, 440, 566, 692, 865, 1132, 1384, 1415, 1730, 1903, 2264, 2830, 3113, 3460, 3806, 5660, 6226, 6920, 7612, 9515, 11320, 12452, 15224, 15565, 19030, 24904, 31130, 38060, 48959, 62260, 76120, 97918, 124520, 195836, 244795, 391672, 489590, 538549, 979180, 1077098, 1958360, 2154196, 2692745, 4308392, 5385490, 10770980, 21541960]

約数ペア:

[(1, 21541960), (2, 10770980), (4, 5385490), (5, 4308392), (8, 2692745), (10, 2154196), (11, 1958360), (20, 1077098), (22, 979180), (40, 538549), (44, 489590), (55, 391672), (88, 244795), (110, 195836), (173, 124520), (220, 97918), (283, 76120), (346, 62260), (440, 48959), (566, 38060), (692, 31130), (865, 24904), (1132, 19030), (1384, 15565), (1415, 15224), (1730, 12452), (1903, 11320), (2264, 9515), (2830, 7612), (3113, 6920), (3460, 6226), (3806, 5660)]