28399820

素因数分解:

$2^2\times 5^1\times {\mathrm{419}}^1\times {\mathrm{3389}}^1$

素因数の和:3817

約数の個数: 24

約数和(自身を含む): 59799600

約数和(自身を除く): 31399780

約数列:

[1, 2, 4, 5, 10, 20, 419, 838, 1676, 2095, 3389, 4190, 6778, 8380, 13556, 16945, 33890, 67780, 1419991, 2839982, 5679964, 7099955, 14199910, 28399820]

約数ペア:

[(1, 28399820), (2, 14199910), (4, 7099955), (5, 5679964), (10, 2839982), (20, 1419991), (419, 67780), (838, 33890), (1676, 16945), (2095, 13556), (3389, 8380), (4190, 6778)]