21104925

素因数分解:

$3^1\times 5^2\times {\mathrm{439}}^1\times {\mathrm{641}}^1$

素因数の和:1093

約数の個数: 24

約数和(自身を含む): 35027520

約数和(自身を除く): 13922595

約数列:

[1, 3, 5, 15, 25, 75, 439, 641, 1317, 1923, 2195, 3205, 6585, 9615, 10975, 16025, 32925, 48075, 281399, 844197, 1406995, 4220985, 7034975, 21104925]

約数ペア:

[(1, 21104925), (3, 7034975), (5, 4220985), (15, 1406995), (25, 844197), (75, 281399), (439, 48075), (641, 32925), (1317, 16025), (1923, 10975), (2195, 9615), (3205, 6585)]