21379712

素因数分解:

$2^7\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:241

約数の個数: 64

約数和(自身を含む): 45900000

約数和(自身を除く): 24520288

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 59, 64, 76, 118, 128, 149, 152, 236, 298, 304, 472, 596, 608, 944, 1121, 1192, 1216, 1888, 2242, 2384, 2432, 2831, 3776, 4484, 4768, 5662, 7552, 8791, 8968, 9536, 11324, 17582, 17936, 19072, 22648, 35164, 35872, 45296, 70328, 71744, 90592, 140656, 143488, 167029, 181184, 281312, 334058, 362368, 562624, 668116, 1125248, 1336232, 2672464, 5344928, 10689856, 21379712]

約数ペア:

[(1, 21379712), (2, 10689856), (4, 5344928), (8, 2672464), (16, 1336232), (19, 1125248), (32, 668116), (38, 562624), (59, 362368), (64, 334058), (76, 281312), (118, 181184), (128, 167029), (149, 143488), (152, 140656), (236, 90592), (298, 71744), (304, 70328), (472, 45296), (596, 35872), (608, 35164), (944, 22648), (1121, 19072), (1192, 17936), (1216, 17582), (1888, 11324), (2242, 9536), (2384, 8968), (2432, 8791), (2831, 7552), (3776, 5662), (4484, 4768)]