21126128

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{191}}^1\times {\mathrm{223}}^1$

素因数の和:453

約数の個数: 40

約数和(自身を含む): 42663936

約数和(自身を除く): 21537808

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 191, 223, 248, 382, 446, 496, 764, 892, 1528, 1784, 3056, 3568, 5921, 6913, 11842, 13826, 23684, 27652, 42593, 47368, 55304, 85186, 94736, 110608, 170372, 340744, 681488, 1320383, 2640766, 5281532, 10563064, 21126128]

約数ペア:

[(1, 21126128), (2, 10563064), (4, 5281532), (8, 2640766), (16, 1320383), (31, 681488), (62, 340744), (124, 170372), (191, 110608), (223, 94736), (248, 85186), (382, 55304), (446, 47368), (496, 42593), (764, 27652), (892, 23684), (1528, 13826), (1784, 11842), (3056, 6913), (3568, 5921)]