21500374420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{978179}}^1$

素因数の和:978352

約数の個数: 48

約数和(自身を含む): 51929619840

約数和(自身を除く): 30429245420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157, 314, 628, 785, 1099, 1570, 2198, 3140, 4396, 5495, 10990, 21980, 978179, 1956358, 3912716, 4890895, 6847253, 9781790, 13694506, 19563580, 27389012, 34236265, 68472530, 136945060, 153574103, 307148206, 614296412, 767870515, 1075018721, 1535741030, 2150037442, 3071482060, 4300074884, 5375093605, 10750187210, 21500374420]

約数ペア:

[(1, 21500374420), (2, 10750187210), (4, 5375093605), (5, 4300074884), (7, 3071482060), (10, 2150037442), (14, 1535741030), (20, 1075018721), (28, 767870515), (35, 614296412), (70, 307148206), (140, 153574103), (157, 136945060), (314, 68472530), (628, 34236265), (785, 27389012), (1099, 19563580), (1570, 13694506), (2198, 9781790), (3140, 6847253), (4396, 4890895), (5495, 3912716), (10990, 1956358), (21980, 978179)]