20889520

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{11353}}^1$

素因数の和:11389

約数の個数: 40

約数和(自身を含む): 50684256

約数和(自身を除く): 29794736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 11353, 22706, 45412, 56765, 90824, 113530, 181648, 227060, 261119, 454120, 522238, 908240, 1044476, 1305595, 2088952, 2611190, 4177904, 5222380, 10444760, 20889520]

約数ペア:

[(1, 20889520), (2, 10444760), (4, 5222380), (5, 4177904), (8, 2611190), (10, 2088952), (16, 1305595), (20, 1044476), (23, 908240), (40, 522238), (46, 454120), (80, 261119), (92, 227060), (115, 181648), (184, 113530), (230, 90824), (368, 56765), (460, 45412), (920, 22706), (1840, 11353)]