21587408

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{613}}^1$

素因数の和:723

約数の個数: 40

約数和(自身を含む): 43854336

約数和(自身を除く): 22266928

約数列:

[1, 2, 4, 8, 16, 31, 62, 71, 124, 142, 248, 284, 496, 568, 613, 1136, 1226, 2201, 2452, 4402, 4904, 8804, 9808, 17608, 19003, 35216, 38006, 43523, 76012, 87046, 152024, 174092, 304048, 348184, 696368, 1349213, 2698426, 5396852, 10793704, 21587408]

約数ペア:

[(1, 21587408), (2, 10793704), (4, 5396852), (8, 2698426), (16, 1349213), (31, 696368), (62, 348184), (71, 304048), (124, 174092), (142, 152024), (248, 87046), (284, 76012), (496, 43523), (568, 38006), (613, 35216), (1136, 19003), (1226, 17608), (2201, 9808), (2452, 8804), (4402, 4904)]