201288520

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{11953}}^1$

素因数の和:12385

約数の個数: 32

約数和(自身を含む): 454012920

約数和(自身を除く): 252724400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1684, 2105, 3368, 4210, 8420, 11953, 16840, 23906, 47812, 59765, 95624, 119530, 239060, 478120, 5032213, 10064426, 20128852, 25161065, 40257704, 50322130, 100644260, 201288520]

約数ペア:

[(1, 201288520), (2, 100644260), (4, 50322130), (5, 40257704), (8, 25161065), (10, 20128852), (20, 10064426), (40, 5032213), (421, 478120), (842, 239060), (1684, 119530), (2105, 95624), (3368, 59765), (4210, 47812), (8420, 23906), (11953, 16840)]