21075860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{787}}^1$

素因数の和:912

約数の個数: 48

約数和(自身を含む): 48187776

約数和(自身を除く): 27111916

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 103, 130, 206, 260, 412, 515, 787, 1030, 1339, 1574, 2060, 2678, 3148, 3935, 5356, 6695, 7870, 10231, 13390, 15740, 20462, 26780, 40924, 51155, 81061, 102310, 162122, 204620, 324244, 405305, 810610, 1053793, 1621220, 2107586, 4215172, 5268965, 10537930, 21075860]

約数ペア:

[(1, 21075860), (2, 10537930), (4, 5268965), (5, 4215172), (10, 2107586), (13, 1621220), (20, 1053793), (26, 810610), (52, 405305), (65, 324244), (103, 204620), (130, 162122), (206, 102310), (260, 81061), (412, 51155), (515, 40924), (787, 26780), (1030, 20462), (1339, 15740), (1574, 13390), (2060, 10231), (2678, 7870), (3148, 6695), (3935, 5356)]