21383778

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{307}}^1$

素因数の和:391

約数の個数: 64

約数和(自身を含む): 49674240

約数和(自身を除く): 28290462

約数列:

[1, 2, 3, 6, 13, 19, 26, 38, 39, 47, 57, 78, 94, 114, 141, 247, 282, 307, 494, 611, 614, 741, 893, 921, 1222, 1482, 1786, 1833, 1842, 2679, 3666, 3991, 5358, 5833, 7982, 11609, 11666, 11973, 14429, 17499, 23218, 23946, 28858, 34827, 34998, 43287, 69654, 75829, 86574, 151658, 187577, 227487, 274151, 375154, 454974, 548302, 562731, 822453, 1125462, 1644906, 3563963, 7127926, 10691889, 21383778]

約数ペア:

[(1, 21383778), (2, 10691889), (3, 7127926), (6, 3563963), (13, 1644906), (19, 1125462), (26, 822453), (38, 562731), (39, 548302), (47, 454974), (57, 375154), (78, 274151), (94, 227487), (114, 187577), (141, 151658), (247, 86574), (282, 75829), (307, 69654), (494, 43287), (611, 34998), (614, 34827), (741, 28858), (893, 23946), (921, 23218), (1222, 17499), (1482, 14429), (1786, 11973), (1833, 11666), (1842, 11609), (2679, 7982), (3666, 5833), (3991, 5358)]