18028205

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{389}}^1$

素因数の和:461

約数の個数: 32

約数和(自身を含む): 25159680

約数和(自身を除く): 7131475

約数列:

[1, 5, 13, 23, 31, 65, 115, 155, 299, 389, 403, 713, 1495, 1945, 2015, 3565, 5057, 8947, 9269, 12059, 25285, 44735, 46345, 60295, 116311, 156767, 277357, 581555, 783835, 1386785, 3605641, 18028205]

約数ペア:

[(1, 18028205), (5, 3605641), (13, 1386785), (23, 783835), (31, 581555), (65, 277357), (115, 156767), (155, 116311), (299, 60295), (389, 46345), (403, 44735), (713, 25285), (1495, 12059), (1945, 9269), (2015, 8947), (3565, 5057)]