21164816

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{601}}^1$

素因数の和:711

約数の個数: 40

約数和(自身を含む): 42997248

約数和(自身を除く): 21832432

約数列:

[1, 2, 4, 8, 16, 31, 62, 71, 124, 142, 248, 284, 496, 568, 601, 1136, 1202, 2201, 2404, 4402, 4808, 8804, 9616, 17608, 18631, 35216, 37262, 42671, 74524, 85342, 149048, 170684, 298096, 341368, 682736, 1322801, 2645602, 5291204, 10582408, 21164816]

約数ペア:

[(1, 21164816), (2, 10582408), (4, 5291204), (8, 2645602), (16, 1322801), (31, 682736), (62, 341368), (71, 298096), (124, 170684), (142, 149048), (248, 85342), (284, 74524), (496, 42671), (568, 37262), (601, 35216), (1136, 18631), (1202, 17608), (2201, 9616), (2404, 8804), (4402, 4808)]