21787792

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{109}}^1$

素因数の和:192

約数の個数: 60

約数和(自身を含む): 47405820

約数和(自身を除く): 25618028

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 109, 124, 208, 218, 248, 403, 436, 496, 806, 872, 961, 1417, 1612, 1744, 1922, 2834, 3224, 3379, 3844, 5668, 6448, 6758, 7688, 11336, 12493, 13516, 15376, 22672, 24986, 27032, 43927, 49972, 54064, 87854, 99944, 104749, 175708, 199888, 209498, 351416, 418996, 702832, 837992, 1361737, 1675984, 2723474, 5446948, 10893896, 21787792]

約数ペア:

[(1, 21787792), (2, 10893896), (4, 5446948), (8, 2723474), (13, 1675984), (16, 1361737), (26, 837992), (31, 702832), (52, 418996), (62, 351416), (104, 209498), (109, 199888), (124, 175708), (208, 104749), (218, 99944), (248, 87854), (403, 54064), (436, 49972), (496, 43927), (806, 27032), (872, 24986), (961, 22672), (1417, 15376), (1612, 13516), (1744, 12493), (1922, 11336), (2834, 7688), (3224, 6758), (3379, 6448), (3844, 5668)]