21528560

素因数分解:

$2^4\times 5^1\times {\mathrm{439}}^1\times {\mathrm{613}}^1$

素因数の和:1065

約数の個数: 40

約数和(自身を含む): 50249760

約数和(自身を除く): 28721200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 439, 613, 878, 1226, 1756, 2195, 2452, 3065, 3512, 4390, 4904, 6130, 7024, 8780, 9808, 12260, 17560, 24520, 35120, 49040, 269107, 538214, 1076428, 1345535, 2152856, 2691070, 4305712, 5382140, 10764280, 21528560]

約数ペア:

[(1, 21528560), (2, 10764280), (4, 5382140), (5, 4305712), (8, 2691070), (10, 2152856), (16, 1345535), (20, 1076428), (40, 538214), (80, 269107), (439, 49040), (613, 35120), (878, 24520), (1226, 17560), (1756, 12260), (2195, 9808), (2452, 8780), (3065, 7024), (3512, 6130), (4390, 4904)]