21580216

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^2\times {\mathrm{401}}^1$

素因数の和:476

約数の個数: 48

約数和(自身を含む): 47902320

約数和(自身を除く): 26322104

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 56, 62, 124, 217, 248, 401, 434, 802, 868, 961, 1604, 1736, 1922, 2807, 3208, 3844, 5614, 6727, 7688, 11228, 12431, 13454, 22456, 24862, 26908, 49724, 53816, 87017, 99448, 174034, 348068, 385361, 696136, 770722, 1541444, 2697527, 3082888, 5395054, 10790108, 21580216]

約数ペア:

[(1, 21580216), (2, 10790108), (4, 5395054), (7, 3082888), (8, 2697527), (14, 1541444), (28, 770722), (31, 696136), (56, 385361), (62, 348068), (124, 174034), (217, 99448), (248, 87017), (401, 53816), (434, 49724), (802, 26908), (868, 24862), (961, 22456), (1604, 13454), (1736, 12431), (1922, 11228), (2807, 7688), (3208, 6727), (3844, 5614)]