21120080

素因数分解:

$2^4\times 5^1\times {\mathrm{227}}^1\times {\mathrm{1163}}^1$

素因数の和:1403

約数の個数: 40

約数和(自身を含む): 49362912

約数和(自身を除く): 28242832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 227, 454, 908, 1135, 1163, 1816, 2270, 2326, 3632, 4540, 4652, 5815, 9080, 9304, 11630, 18160, 18608, 23260, 46520, 93040, 264001, 528002, 1056004, 1320005, 2112008, 2640010, 4224016, 5280020, 10560040, 21120080]

約数ペア:

[(1, 21120080), (2, 10560040), (4, 5280020), (5, 4224016), (8, 2640010), (10, 2112008), (16, 1320005), (20, 1056004), (40, 528002), (80, 264001), (227, 93040), (454, 46520), (908, 23260), (1135, 18608), (1163, 18160), (1816, 11630), (2270, 9304), (2326, 9080), (3632, 5815), (4540, 4652)]