20484920

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7213}}^1$

素因数の和:7295

約数の個数: 32

約数和(自身を含む): 46746720

約数和(自身を除く): 26261800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7213, 14426, 28852, 36065, 57704, 72130, 144260, 288520, 512123, 1024246, 2048492, 2560615, 4096984, 5121230, 10242460, 20484920]

約数ペア:

[(1, 20484920), (2, 10242460), (4, 5121230), (5, 4096984), (8, 2560615), (10, 2048492), (20, 1024246), (40, 512123), (71, 288520), (142, 144260), (284, 72130), (355, 57704), (568, 36065), (710, 28852), (1420, 14426), (2840, 7213)]