21291201790

素因数分解:

$2^1\times 5^1\times {\mathrm{5483}}^1\times {\mathrm{388313}}^1$

素因数の和:393803

約数の個数: 16

約数和(自身を含む): 38331251568

約数和(自身を除く): 17040049778

約数列:

[1, 2, 5, 10, 5483, 10966, 27415, 54830, 388313, 776626, 1941565, 3883130, 2129120179, 4258240358, 10645600895, 21291201790]

約数ペア:

[(1, 21291201790), (2, 10645600895), (5, 4258240358), (10, 2129120179), (5483, 3883130), (10966, 1941565), (27415, 776626), (54830, 388313)]