21045860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{271}}^1\times {\mathrm{353}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 48529152

約数和(自身を除く): 27483292

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 271, 353, 542, 706, 1084, 1355, 1412, 1765, 2710, 2981, 3530, 3883, 5420, 5962, 7060, 7766, 11924, 14905, 15532, 19415, 29810, 38830, 59620, 77660, 95663, 191326, 382652, 478315, 956630, 1052293, 1913260, 2104586, 4209172, 5261465, 10522930, 21045860]

約数ペア:

[(1, 21045860), (2, 10522930), (4, 5261465), (5, 4209172), (10, 2104586), (11, 1913260), (20, 1052293), (22, 956630), (44, 478315), (55, 382652), (110, 191326), (220, 95663), (271, 77660), (353, 59620), (542, 38830), (706, 29810), (1084, 19415), (1355, 15532), (1412, 14905), (1765, 11924), (2710, 7766), (2981, 7060), (3530, 5962), (3883, 5420)]