21519320

素因数分解:

$2^3\times 5^1\times {\mathrm{283}}^1\times {\mathrm{1901}}^1$

素因数の和:2195

約数の個数: 32

約数和(自身を含む): 48615120

約数和(自身を除く): 27095800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 283, 566, 1132, 1415, 1901, 2264, 2830, 3802, 5660, 7604, 9505, 11320, 15208, 19010, 38020, 76040, 537983, 1075966, 2151932, 2689915, 4303864, 5379830, 10759660, 21519320]

約数ペア:

[(1, 21519320), (2, 10759660), (4, 5379830), (5, 4303864), (8, 2689915), (10, 2151932), (20, 1075966), (40, 537983), (283, 76040), (566, 38020), (1132, 19010), (1415, 15208), (1901, 11320), (2264, 9505), (2830, 7604), (3802, 5660)]