21008106

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{149}}^1\times {\mathrm{373}}^1$

素因数の和:540

約数の個数: 64

約数和(自身を含む): 53856000

約数和(自身を除く): 32847894

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 149, 189, 298, 373, 378, 447, 746, 894, 1043, 1119, 1341, 2086, 2238, 2611, 2682, 3129, 3357, 4023, 5222, 6258, 6714, 7833, 8046, 9387, 10071, 15666, 18774, 20142, 23499, 28161, 46998, 55577, 56322, 70497, 111154, 140994, 166731, 333462, 389039, 500193, 778078, 1000386, 1167117, 1500579, 2334234, 3001158, 3501351, 7002702, 10504053, 21008106]

約数ペア:

[(1, 21008106), (2, 10504053), (3, 7002702), (6, 3501351), (7, 3001158), (9, 2334234), (14, 1500579), (18, 1167117), (21, 1000386), (27, 778078), (42, 500193), (54, 389039), (63, 333462), (126, 166731), (149, 140994), (189, 111154), (298, 70497), (373, 56322), (378, 55577), (447, 46998), (746, 28161), (894, 23499), (1043, 20142), (1119, 18774), (1341, 15666), (2086, 10071), (2238, 9387), (2611, 8046), (2682, 7833), (3129, 6714), (3357, 6258), (4023, 5222)]