20667731

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1$

素因数の和:203

約数の個数: 32

約数和(自身を含む): 26320896

約数和(自身を除く): 5653165

約数列:

[1, 7, 23, 31, 41, 101, 161, 217, 287, 707, 713, 943, 1271, 2323, 3131, 4141, 4991, 6601, 8897, 16261, 21917, 28987, 29233, 72013, 95243, 128371, 204631, 504091, 666701, 898597, 2952533, 20667731]

約数ペア:

[(1, 20667731), (7, 2952533), (23, 898597), (31, 666701), (41, 504091), (101, 204631), (161, 128371), (217, 95243), (287, 72013), (707, 29233), (713, 28987), (943, 21917), (1271, 16261), (2323, 8897), (3131, 6601), (4141, 4991)]