20654720

素因数分解:

$2^7\times 5^1\times {\mathrm{59}}^1\times {\mathrm{547}}^1$

素因数の和:625

約数の個数: 64

約数和(自身を含む): 50306400

約数和(自身を除く): 29651680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 64, 80, 118, 128, 160, 236, 295, 320, 472, 547, 590, 640, 944, 1094, 1180, 1888, 2188, 2360, 2735, 3776, 4376, 4720, 5470, 7552, 8752, 9440, 10940, 17504, 18880, 21880, 32273, 35008, 37760, 43760, 64546, 70016, 87520, 129092, 161365, 175040, 258184, 322730, 350080, 516368, 645460, 1032736, 1290920, 2065472, 2581840, 4130944, 5163680, 10327360, 20654720]

約数ペア:

[(1, 20654720), (2, 10327360), (4, 5163680), (5, 4130944), (8, 2581840), (10, 2065472), (16, 1290920), (20, 1032736), (32, 645460), (40, 516368), (59, 350080), (64, 322730), (80, 258184), (118, 175040), (128, 161365), (160, 129092), (236, 87520), (295, 70016), (320, 64546), (472, 43760), (547, 37760), (590, 35008), (640, 32273), (944, 21880), (1094, 18880), (1180, 17504), (1888, 10940), (2188, 9440), (2360, 8752), (2735, 7552), (3776, 5470), (4376, 4720)]