21684980

素因数分解:

$2^2\times 5^1\times {\mathrm{983}}^1\times {\mathrm{1103}}^1$

素因数の和:2095

約数の個数: 24

約数和(自身を含む): 45626112

約数和(自身を除く): 23941132

約数列:

[1, 2, 4, 5, 10, 20, 983, 1103, 1966, 2206, 3932, 4412, 4915, 5515, 9830, 11030, 19660, 22060, 1084249, 2168498, 4336996, 5421245, 10842490, 21684980]

約数ペア:

[(1, 21684980), (2, 10842490), (4, 5421245), (5, 4336996), (10, 2168498), (20, 1084249), (983, 22060), (1103, 19660), (1966, 11030), (2206, 9830), (3932, 5515), (4412, 4915)]