18981376

素因数分解:

$2^9\times {\mathrm{131}}^1\times {\mathrm{283}}^1$

素因数の和:432

約数の個数: 40

約数和(自身を含む): 38350224

約数和(自身を除く): 19368848

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 131, 256, 262, 283, 512, 524, 566, 1048, 1132, 2096, 2264, 4192, 4528, 8384, 9056, 16768, 18112, 33536, 36224, 37073, 67072, 72448, 74146, 144896, 148292, 296584, 593168, 1186336, 2372672, 4745344, 9490688, 18981376]

約数ペア:

[(1, 18981376), (2, 9490688), (4, 4745344), (8, 2372672), (16, 1186336), (32, 593168), (64, 296584), (128, 148292), (131, 144896), (256, 74146), (262, 72448), (283, 67072), (512, 37073), (524, 36224), (566, 33536), (1048, 18112), (1132, 16768), (2096, 9056), (2264, 8384), (4192, 4528)]