21493593

素因数分解:

$3^5\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1$

素因数の和:97

約数の個数: 72

約数和(自身を含む): 38342304

約数和(自身を除く): 16848711

約数列:

[1, 3, 9, 11, 17, 27, 33, 43, 51, 81, 99, 121, 129, 153, 187, 243, 297, 363, 387, 459, 473, 561, 731, 891, 1089, 1161, 1377, 1419, 1683, 2057, 2193, 2673, 3267, 3483, 4131, 4257, 5049, 5203, 6171, 6579, 8041, 9801, 10449, 12771, 15147, 15609, 18513, 19737, 24123, 29403, 38313, 45441, 46827, 55539, 59211, 72369, 88451, 114939, 140481, 166617, 177633, 217107, 265353, 421443, 499851, 651321, 796059, 1264329, 1953963, 2388177, 7164531, 21493593]

約数ペア:

[(1, 21493593), (3, 7164531), (9, 2388177), (11, 1953963), (17, 1264329), (27, 796059), (33, 651321), (43, 499851), (51, 421443), (81, 265353), (99, 217107), (121, 177633), (129, 166617), (153, 140481), (187, 114939), (243, 88451), (297, 72369), (363, 59211), (387, 55539), (459, 46827), (473, 45441), (561, 38313), (731, 29403), (891, 24123), (1089, 19737), (1161, 18513), (1377, 15609), (1419, 15147), (1683, 12771), (2057, 10449), (2193, 9801), (2673, 8041), (3267, 6579), (3483, 6171), (4131, 5203), (4257, 5049)]