21257496

素因数分解:

$2^3\times 3^2\times {\mathrm{13}}^2\times {\mathrm{1747}}^1$

素因数の和:1785

約数の個数: 72

約数和(自身を含む): 62377380

約数和(自身を除く): 41119884

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 18, 24, 26, 36, 39, 52, 72, 78, 104, 117, 156, 169, 234, 312, 338, 468, 507, 676, 936, 1014, 1352, 1521, 1747, 2028, 3042, 3494, 4056, 5241, 6084, 6988, 10482, 12168, 13976, 15723, 20964, 22711, 31446, 41928, 45422, 62892, 68133, 90844, 125784, 136266, 181688, 204399, 272532, 295243, 408798, 545064, 590486, 817596, 885729, 1180972, 1635192, 1771458, 2361944, 2657187, 3542916, 5314374, 7085832, 10628748, 21257496]

約数ペア:

[(1, 21257496), (2, 10628748), (3, 7085832), (4, 5314374), (6, 3542916), (8, 2657187), (9, 2361944), (12, 1771458), (13, 1635192), (18, 1180972), (24, 885729), (26, 817596), (36, 590486), (39, 545064), (52, 408798), (72, 295243), (78, 272532), (104, 204399), (117, 181688), (156, 136266), (169, 125784), (234, 90844), (312, 68133), (338, 62892), (468, 45422), (507, 41928), (676, 31446), (936, 22711), (1014, 20964), (1352, 15723), (1521, 13976), (1747, 12168), (2028, 10482), (3042, 6988), (3494, 6084), (4056, 5241)]