21411080

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^2\times {\mathrm{557}}^1$

素因数の和:630

約数の個数: 48

約数和(自身を含む): 49868460

約数和(自身を除く): 28457380

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 557, 620, 961, 1114, 1240, 1922, 2228, 2785, 3844, 4456, 4805, 5570, 7688, 9610, 11140, 17267, 19220, 22280, 34534, 38440, 69068, 86335, 138136, 172670, 345340, 535277, 690680, 1070554, 2141108, 2676385, 4282216, 5352770, 10705540, 21411080]

約数ペア:

[(1, 21411080), (2, 10705540), (4, 5352770), (5, 4282216), (8, 2676385), (10, 2141108), (20, 1070554), (31, 690680), (40, 535277), (62, 345340), (124, 172670), (155, 138136), (248, 86335), (310, 69068), (557, 38440), (620, 34534), (961, 22280), (1114, 19220), (1240, 17267), (1922, 11140), (2228, 9610), (2785, 7688), (3844, 5570), (4456, 4805)]