21423440

素因数分解:

$2^4\times 5^1\times {\mathrm{281}}^1\times {\mathrm{953}}^1$

素因数の和:1247

約数の個数: 40

約数和(自身を含む): 50039208

約数和(自身を除く): 28615768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 281, 562, 953, 1124, 1405, 1906, 2248, 2810, 3812, 4496, 4765, 5620, 7624, 9530, 11240, 15248, 19060, 22480, 38120, 76240, 267793, 535586, 1071172, 1338965, 2142344, 2677930, 4284688, 5355860, 10711720, 21423440]

約数ペア:

[(1, 21423440), (2, 10711720), (4, 5355860), (5, 4284688), (8, 2677930), (10, 2142344), (16, 1338965), (20, 1071172), (40, 535586), (80, 267793), (281, 76240), (562, 38120), (953, 22480), (1124, 19060), (1405, 15248), (1906, 11240), (2248, 9530), (2810, 7624), (3812, 5620), (4496, 4765)]