21423320

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13063}}^1$

素因数の和:13115

約数の個数: 32

約数和(自身を含む): 49381920

約数和(自身を除く): 27958600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13063, 26126, 52252, 65315, 104504, 130630, 261260, 522520, 535583, 1071166, 2142332, 2677915, 4284664, 5355830, 10711660, 21423320]

約数ペア:

[(1, 21423320), (2, 10711660), (4, 5355830), (5, 4284664), (8, 2677915), (10, 2142332), (20, 1071166), (40, 535583), (41, 522520), (82, 261260), (164, 130630), (205, 104504), (328, 65315), (410, 52252), (820, 26126), (1640, 13063)]