20907520

素因数分解:

$2^9\times 5^1\times {\mathrm{8167}}^1$

素因数の和:8190

約数の個数: 40

約数和(自身を含む): 50135184

約数和(自身を除く): 29227664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8167, 16334, 32668, 40835, 65336, 81670, 130672, 163340, 261344, 326680, 522688, 653360, 1045376, 1306720, 2090752, 2613440, 4181504, 5226880, 10453760, 20907520]

約数ペア:

[(1, 20907520), (2, 10453760), (4, 5226880), (5, 4181504), (8, 2613440), (10, 2090752), (16, 1306720), (20, 1045376), (32, 653360), (40, 522688), (64, 326680), (80, 261344), (128, 163340), (160, 130672), (256, 81670), (320, 65336), (512, 40835), (640, 32668), (1280, 16334), (2560, 8167)]