20820976

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{281}}^1\times {\mathrm{421}}^1$

素因数の和:721

約数の個数: 40

約数和(自身を含む): 44269488

約数和(自身を除く): 23448512

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 281, 421, 562, 842, 1124, 1684, 2248, 3091, 3368, 4496, 4631, 6182, 6736, 9262, 12364, 18524, 24728, 37048, 49456, 74096, 118301, 236602, 473204, 946408, 1301311, 1892816, 2602622, 5205244, 10410488, 20820976]

約数ペア:

[(1, 20820976), (2, 10410488), (4, 5205244), (8, 2602622), (11, 1892816), (16, 1301311), (22, 946408), (44, 473204), (88, 236602), (176, 118301), (281, 74096), (421, 49456), (562, 37048), (842, 24728), (1124, 18524), (1684, 12364), (2248, 9262), (3091, 6736), (3368, 6182), (4496, 4631)]