21011188

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{613}}^1$

素因数の和:688

約数の個数: 48

約数和(自身を含む): 43323840

約数和(自身を除く): 22312652

約数列:

[1, 2, 4, 11, 19, 22, 38, 41, 44, 76, 82, 164, 209, 418, 451, 613, 779, 836, 902, 1226, 1558, 1804, 2452, 3116, 6743, 8569, 11647, 13486, 17138, 23294, 25133, 26972, 34276, 46588, 50266, 100532, 128117, 256234, 276463, 477527, 512468, 552926, 955054, 1105852, 1910108, 5252797, 10505594, 21011188]

約数ペア:

[(1, 21011188), (2, 10505594), (4, 5252797), (11, 1910108), (19, 1105852), (22, 955054), (38, 552926), (41, 512468), (44, 477527), (76, 276463), (82, 256234), (164, 128117), (209, 100532), (418, 50266), (451, 46588), (613, 34276), (779, 26972), (836, 25133), (902, 23294), (1226, 17138), (1558, 13486), (1804, 11647), (2452, 8569), (3116, 6743)]