20967040

素因数分解:

$2^7\times 5^1\times {\mathrm{181}}^2$

素因数の和:381

約数の個数: 48

約数和(自身を含む): 50402790

約数和(自身を除く): 29435750

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 181, 320, 362, 640, 724, 905, 1448, 1810, 2896, 3620, 5792, 7240, 11584, 14480, 23168, 28960, 32761, 57920, 65522, 115840, 131044, 163805, 262088, 327610, 524176, 655220, 1048352, 1310440, 2096704, 2620880, 4193408, 5241760, 10483520, 20967040]

約数ペア:

[(1, 20967040), (2, 10483520), (4, 5241760), (5, 4193408), (8, 2620880), (10, 2096704), (16, 1310440), (20, 1048352), (32, 655220), (40, 524176), (64, 327610), (80, 262088), (128, 163805), (160, 131044), (181, 115840), (320, 65522), (362, 57920), (640, 32761), (724, 28960), (905, 23168), (1448, 14480), (1810, 11584), (2896, 7240), (3620, 5792)]