21509838

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{3221}}^1$

素因数の和:3289

約数の個数: 48

約数和(自身を含む): 54284256

約数和(自身を除く): 32774418

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 53, 63, 106, 126, 159, 318, 371, 477, 742, 954, 1113, 2226, 3221, 3339, 6442, 6678, 9663, 19326, 22547, 28989, 45094, 57978, 67641, 135282, 170713, 202923, 341426, 405846, 512139, 1024278, 1194991, 1536417, 2389982, 3072834, 3584973, 7169946, 10754919, 21509838]

約数ペア:

[(1, 21509838), (2, 10754919), (3, 7169946), (6, 3584973), (7, 3072834), (9, 2389982), (14, 1536417), (18, 1194991), (21, 1024278), (42, 512139), (53, 405846), (63, 341426), (106, 202923), (126, 170713), (159, 135282), (318, 67641), (371, 57978), (477, 45094), (742, 28989), (954, 22547), (1113, 19326), (2226, 9663), (3221, 6678), (3339, 6442)]