21880720

素因数分解:

$2^4\times 5^1\times {\mathrm{479}}^1\times {\mathrm{571}}^1$

素因数の和:1063

約数の個数: 40

約数和(自身を含む): 51068160

約数和(自身を除く): 29187440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 479, 571, 958, 1142, 1916, 2284, 2395, 2855, 3832, 4568, 4790, 5710, 7664, 9136, 9580, 11420, 19160, 22840, 38320, 45680, 273509, 547018, 1094036, 1367545, 2188072, 2735090, 4376144, 5470180, 10940360, 21880720]

約数ペア:

[(1, 21880720), (2, 10940360), (4, 5470180), (5, 4376144), (8, 2735090), (10, 2188072), (16, 1367545), (20, 1094036), (40, 547018), (80, 273509), (479, 45680), (571, 38320), (958, 22840), (1142, 19160), (1916, 11420), (2284, 9580), (2395, 9136), (2855, 7664), (3832, 5710), (4568, 4790)]