81499990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{56993}}^1$

素因数の和:57024

約数の個数: 32

約数和(自身を含む): 172349856

約数和(自身を除く): 90849866

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 110, 130, 143, 286, 715, 1430, 56993, 113986, 284965, 569930, 626923, 740909, 1253846, 1481818, 3134615, 3704545, 6269230, 7409090, 8149999, 16299998, 40749995, 81499990]

約数ペア:

[(1, 81499990), (2, 40749995), (5, 16299998), (10, 8149999), (11, 7409090), (13, 6269230), (22, 3704545), (26, 3134615), (55, 1481818), (65, 1253846), (110, 740909), (130, 626923), (143, 569930), (286, 284965), (715, 113986), (1430, 56993)]