21000912565

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{367}}^1\times {\mathrm{4831}}^1$

素因数の和:5329

約数の個数: 32

約数和(自身を含む): 26629963776

約数和(自身を除く): 5629051211

約数列:

[1, 5, 23, 103, 115, 367, 515, 1835, 2369, 4831, 8441, 11845, 24155, 37801, 42205, 111113, 189005, 497593, 555565, 869423, 1772977, 2487965, 4347115, 8864885, 11444639, 40778471, 57223195, 182616631, 203892355, 913083155, 4200182513, 21000912565]

約数ペア:

[(1, 21000912565), (5, 4200182513), (23, 913083155), (103, 203892355), (115, 182616631), (367, 57223195), (515, 40778471), (1835, 11444639), (2369, 8864885), (4831, 4347115), (8441, 2487965), (11845, 1772977), (24155, 869423), (37801, 555565), (42205, 497593), (111113, 189005)]