81721270

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1\times {\mathrm{1103}}^1$

素因数の和:1380

約数の個数: 32

約数和(自身を含む): 152616960

約数和(自身を除く): 70895690

約数列:

[1, 2, 5, 10, 31, 62, 155, 239, 310, 478, 1103, 1195, 2206, 2390, 5515, 7409, 11030, 14818, 34193, 37045, 68386, 74090, 170965, 263617, 341930, 527234, 1318085, 2636170, 8172127, 16344254, 40860635, 81721270]

約数ペア:

[(1, 81721270), (2, 40860635), (5, 16344254), (10, 8172127), (31, 2636170), (62, 1318085), (155, 527234), (239, 341930), (310, 263617), (478, 170965), (1103, 74090), (1195, 68386), (2206, 37045), (2390, 34193), (5515, 14818), (7409, 11030)]