21485860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{769}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 49674240

約数和(自身を除く): 28188380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 127, 220, 254, 508, 635, 769, 1270, 1397, 1538, 2540, 2794, 3076, 3845, 5588, 6985, 7690, 8459, 13970, 15380, 16918, 27940, 33836, 42295, 84590, 97663, 169180, 195326, 390652, 488315, 976630, 1074293, 1953260, 2148586, 4297172, 5371465, 10742930, 21485860]

約数ペア:

[(1, 21485860), (2, 10742930), (4, 5371465), (5, 4297172), (10, 2148586), (11, 1953260), (20, 1074293), (22, 976630), (44, 488315), (55, 390652), (110, 195326), (127, 169180), (220, 97663), (254, 84590), (508, 42295), (635, 33836), (769, 27940), (1270, 16918), (1397, 15380), (1538, 13970), (2540, 8459), (2794, 7690), (3076, 6985), (3845, 5588)]