20272640

素因数分解:

$2^9\times 5^1\times {\mathrm{7919}}^1$

素因数の和:7942

約数の個数: 40

約数和(自身を含む): 48612960

約数和(自身を除く): 28340320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 7919, 15838, 31676, 39595, 63352, 79190, 126704, 158380, 253408, 316760, 506816, 633520, 1013632, 1267040, 2027264, 2534080, 4054528, 5068160, 10136320, 20272640]

約数ペア:

[(1, 20272640), (2, 10136320), (4, 5068160), (5, 4054528), (8, 2534080), (10, 2027264), (16, 1267040), (20, 1013632), (32, 633520), (40, 506816), (64, 316760), (80, 253408), (128, 158380), (160, 126704), (256, 79190), (320, 63352), (512, 39595), (640, 31676), (1280, 15838), (2560, 7919)]