21256858

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{509}}^1$

素因数の和:694

約数の個数: 32

約数和(自身を含む): 38678400

約数和(自身を除く): 17421542

約数列:

[1, 2, 7, 14, 19, 38, 133, 157, 266, 314, 509, 1018, 1099, 2198, 2983, 3563, 5966, 7126, 9671, 19342, 20881, 41762, 67697, 79913, 135394, 159826, 559391, 1118782, 1518347, 3036694, 10628429, 21256858]

約数ペア:

[(1, 21256858), (2, 10628429), (7, 3036694), (14, 1518347), (19, 1118782), (38, 559391), (133, 159826), (157, 135394), (266, 79913), (314, 67697), (509, 41762), (1018, 20881), (1099, 19342), (2198, 9671), (2983, 7126), (3563, 5966)]