21958840

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6949}}^1$

素因数の和:7039

約数の個数: 32

約数和(自身を含む): 50040000

約数和(自身を除く): 28081160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6949, 13898, 27796, 34745, 55592, 69490, 138980, 277960, 548971, 1097942, 2195884, 2744855, 4391768, 5489710, 10979420, 21958840]

約数ペア:

[(1, 21958840), (2, 10979420), (4, 5489710), (5, 4391768), (8, 2744855), (10, 2195884), (20, 1097942), (40, 548971), (79, 277960), (158, 138980), (316, 69490), (395, 55592), (632, 34745), (790, 27796), (1580, 13898), (3160, 6949)]