20987325

素因数分解:

$3^2\times 5^2\times {\mathrm{37}}^1\times {\mathrm{2521}}^1$

素因数の和:2574

約数の個数: 36

約数和(自身を含む): 38621908

約数和(自身を除く): 17634583

約数列:

[1, 3, 5, 9, 15, 25, 37, 45, 75, 111, 185, 225, 333, 555, 925, 1665, 2521, 2775, 7563, 8325, 12605, 22689, 37815, 63025, 93277, 113445, 189075, 279831, 466385, 567225, 839493, 1399155, 2331925, 4197465, 6995775, 20987325]

約数ペア:

[(1, 20987325), (3, 6995775), (5, 4197465), (9, 2331925), (15, 1399155), (25, 839493), (37, 567225), (45, 466385), (75, 279831), (111, 189075), (185, 113445), (225, 93277), (333, 63025), (555, 37815), (925, 22689), (1665, 12605), (2521, 8325), (2775, 7563)]