20438390

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{787}}^1$

素因数の和:861

約数の個数: 48

約数和(自身を含む): 43658352

約数和(自身を除く): 23219962

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 53, 70, 98, 106, 245, 265, 371, 490, 530, 742, 787, 1574, 1855, 2597, 3710, 3935, 5194, 5509, 7870, 11018, 12985, 25970, 27545, 38563, 41711, 55090, 77126, 83422, 192815, 208555, 291977, 385630, 417110, 583954, 1459885, 2043839, 2919770, 4087678, 10219195, 20438390]

約数ペア:

[(1, 20438390), (2, 10219195), (5, 4087678), (7, 2919770), (10, 2043839), (14, 1459885), (35, 583954), (49, 417110), (53, 385630), (70, 291977), (98, 208555), (106, 192815), (245, 83422), (265, 77126), (371, 55090), (490, 41711), (530, 38563), (742, 27545), (787, 25970), (1574, 12985), (1855, 11018), (2597, 7870), (3710, 5509), (3935, 5194)]