21345920

素因数分解:

$2^7\times 5^1\times {\mathrm{33353}}^1$

素因数の和:33372

約数の個数: 32

約数和(自身を含む): 51031620

約数和(自身を除く): 29685700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33353, 66706, 133412, 166765, 266824, 333530, 533648, 667060, 1067296, 1334120, 2134592, 2668240, 4269184, 5336480, 10672960, 21345920]

約数ペア:

[(1, 21345920), (2, 10672960), (4, 5336480), (5, 4269184), (8, 2668240), (10, 2134592), (16, 1334120), (20, 1067296), (32, 667060), (40, 533648), (64, 333530), (80, 266824), (128, 166765), (160, 133412), (320, 66706), (640, 33353)]