21391146

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{79}}^1\times {\mathrm{307}}^1$

素因数の和:408

約数の個数: 72

約数和(自身を含む): 54774720

約数和(自身を除く): 33383574

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 63, 79, 98, 126, 147, 158, 237, 294, 307, 441, 474, 553, 614, 711, 882, 921, 1106, 1422, 1659, 1842, 2149, 2763, 3318, 3871, 4298, 4977, 5526, 6447, 7742, 9954, 11613, 12894, 15043, 19341, 23226, 24253, 30086, 34839, 38682, 45129, 48506, 69678, 72759, 90258, 135387, 145518, 169771, 218277, 270774, 339542, 436554, 509313, 1018626, 1188397, 1527939, 2376794, 3055878, 3565191, 7130382, 10695573, 21391146]

約数ペア:

[(1, 21391146), (2, 10695573), (3, 7130382), (6, 3565191), (7, 3055878), (9, 2376794), (14, 1527939), (18, 1188397), (21, 1018626), (42, 509313), (49, 436554), (63, 339542), (79, 270774), (98, 218277), (126, 169771), (147, 145518), (158, 135387), (237, 90258), (294, 72759), (307, 69678), (441, 48506), (474, 45129), (553, 38682), (614, 34839), (711, 30086), (882, 24253), (921, 23226), (1106, 19341), (1422, 15043), (1659, 12894), (1842, 11613), (2149, 9954), (2763, 7742), (3318, 6447), (3871, 5526), (4298, 4977)]