21099756

素因数分解:

$2^2\times 3^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{397}}^1$

素因数の和:550

約数の個数: 48

約数和(自身を含む): 50994944

約数和(自身を除く): 29895188

約数列:

[1, 2, 3, 4, 6, 12, 43, 86, 103, 129, 172, 206, 258, 309, 397, 412, 516, 618, 794, 1191, 1236, 1588, 2382, 4429, 4764, 8858, 13287, 17071, 17716, 26574, 34142, 40891, 51213, 53148, 68284, 81782, 102426, 122673, 163564, 204852, 245346, 490692, 1758313, 3516626, 5274939, 7033252, 10549878, 21099756]

約数ペア:

[(1, 21099756), (2, 10549878), (3, 7033252), (4, 5274939), (6, 3516626), (12, 1758313), (43, 490692), (86, 245346), (103, 204852), (129, 163564), (172, 122673), (206, 102426), (258, 81782), (309, 68284), (397, 53148), (412, 51213), (516, 40891), (618, 34142), (794, 26574), (1191, 17716), (1236, 17071), (1588, 13287), (2382, 8858), (4429, 4764)]