20856320

素因数分解:

$2^9\times 5^1\times {\mathrm{8147}}^1$

素因数の和:8170

約数の個数: 40

約数和(自身を含む): 50012424

約数和(自身を除く): 29156104

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8147, 16294, 32588, 40735, 65176, 81470, 130352, 162940, 260704, 325880, 521408, 651760, 1042816, 1303520, 2085632, 2607040, 4171264, 5214080, 10428160, 20856320]

約数ペア:

[(1, 20856320), (2, 10428160), (4, 5214080), (5, 4171264), (8, 2607040), (10, 2085632), (16, 1303520), (20, 1042816), (32, 651760), (40, 521408), (64, 325880), (80, 260704), (128, 162940), (160, 130352), (256, 81470), (320, 65176), (512, 40735), (640, 32588), (1280, 16294), (2560, 8147)]