21195313808

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{501593}}^1$

素因数の和:501759

約数の個数: 40

約数和(自身を含む): 43538359200

約数和(自身を除く): 22343045392

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 139, 152, 278, 304, 556, 1112, 2224, 2641, 5282, 10564, 21128, 42256, 501593, 1003186, 2006372, 4012744, 8025488, 9530267, 19060534, 38121068, 69721427, 76242136, 139442854, 152484272, 278885708, 557771416, 1115542832, 1324707113, 2649414226, 5298828452, 10597656904, 21195313808]

約数ペア:

[(1, 21195313808), (2, 10597656904), (4, 5298828452), (8, 2649414226), (16, 1324707113), (19, 1115542832), (38, 557771416), (76, 278885708), (139, 152484272), (152, 139442854), (278, 76242136), (304, 69721427), (556, 38121068), (1112, 19060534), (2224, 9530267), (2641, 8025488), (5282, 4012744), (10564, 2006372), (21128, 1003186), (42256, 501593)]