21850040

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{263}}^1$

素因数の和:372

約数の個数: 64

約数和(自身を含む): 51701760

約数和(自身を除く): 29851720

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 67, 124, 134, 155, 248, 263, 268, 310, 335, 526, 536, 620, 670, 1052, 1240, 1315, 1340, 2077, 2104, 2630, 2680, 4154, 5260, 8153, 8308, 10385, 10520, 16306, 16616, 17621, 20770, 32612, 35242, 40765, 41540, 65224, 70484, 81530, 83080, 88105, 140968, 163060, 176210, 326120, 352420, 546251, 704840, 1092502, 2185004, 2731255, 4370008, 5462510, 10925020, 21850040]

約数ペア:

[(1, 21850040), (2, 10925020), (4, 5462510), (5, 4370008), (8, 2731255), (10, 2185004), (20, 1092502), (31, 704840), (40, 546251), (62, 352420), (67, 326120), (124, 176210), (134, 163060), (155, 140968), (248, 88105), (263, 83080), (268, 81530), (310, 70484), (335, 65224), (526, 41540), (536, 40765), (620, 35242), (670, 32612), (1052, 20770), (1240, 17621), (1315, 16616), (1340, 16306), (2077, 10520), (2104, 10385), (2630, 8308), (2680, 8153), (4154, 5260)]