21085820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{7927}}^1$

素因数の和:7962

約数の個数: 48

約数和(自身を含む): 53276160

約数和(自身を除く): 32190340

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 7927, 15854, 31708, 39635, 55489, 79270, 110978, 150613, 158540, 221956, 277445, 301226, 554890, 602452, 753065, 1054291, 1109780, 1506130, 2108582, 3012260, 4217164, 5271455, 10542910, 21085820]

約数ペア:

[(1, 21085820), (2, 10542910), (4, 5271455), (5, 4217164), (7, 3012260), (10, 2108582), (14, 1506130), (19, 1109780), (20, 1054291), (28, 753065), (35, 602452), (38, 554890), (70, 301226), (76, 277445), (95, 221956), (133, 158540), (140, 150613), (190, 110978), (266, 79270), (380, 55489), (532, 39635), (665, 31708), (1330, 15854), (2660, 7927)]