21015392

素因数分解:

$2^5\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:303

約数の個数: 48

約数和(自身を含む): 43001280

約数和(自身を除く): 21985888

約数列:

[1, 2, 4, 8, 16, 32, 47, 89, 94, 157, 178, 188, 314, 356, 376, 628, 712, 752, 1256, 1424, 1504, 2512, 2848, 4183, 5024, 7379, 8366, 13973, 14758, 16732, 27946, 29516, 33464, 55892, 59032, 66928, 111784, 118064, 133856, 223568, 236128, 447136, 656731, 1313462, 2626924, 5253848, 10507696, 21015392]

約数ペア:

[(1, 21015392), (2, 10507696), (4, 5253848), (8, 2626924), (16, 1313462), (32, 656731), (47, 447136), (89, 236128), (94, 223568), (157, 133856), (178, 118064), (188, 111784), (314, 66928), (356, 59032), (376, 55892), (628, 33464), (712, 29516), (752, 27946), (1256, 16732), (1424, 14758), (1504, 13973), (2512, 8366), (2848, 7379), (4183, 5024)]