21531608

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 48537600

約数和(自身を除く): 27005992

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 56, 62, 79, 124, 157, 158, 217, 248, 314, 316, 434, 553, 628, 632, 868, 1099, 1106, 1256, 1736, 2198, 2212, 2449, 4396, 4424, 4867, 4898, 8792, 9734, 9796, 12403, 17143, 19468, 19592, 24806, 34069, 34286, 38936, 49612, 68138, 68572, 86821, 99224, 136276, 137144, 173642, 272552, 347284, 384493, 694568, 768986, 1537972, 2691451, 3075944, 5382902, 10765804, 21531608]

約数ペア:

[(1, 21531608), (2, 10765804), (4, 5382902), (7, 3075944), (8, 2691451), (14, 1537972), (28, 768986), (31, 694568), (56, 384493), (62, 347284), (79, 272552), (124, 173642), (157, 137144), (158, 136276), (217, 99224), (248, 86821), (314, 68572), (316, 68138), (434, 49612), (553, 38936), (628, 34286), (632, 34069), (868, 24806), (1099, 19592), (1106, 19468), (1256, 17143), (1736, 12403), (2198, 9796), (2212, 9734), (2449, 8792), (4396, 4898), (4424, 4867)]