21278175

素因数分解:

$3^1\times 5^2\times {\mathrm{53}}^2\times {\mathrm{101}}^1$

素因数の和:220

約数の個数: 36

約数和(自身を含む): 36211224

約数和(自身を除く): 14933049

約数列:

[1, 3, 5, 15, 25, 53, 75, 101, 159, 265, 303, 505, 795, 1325, 1515, 2525, 2809, 3975, 5353, 7575, 8427, 14045, 16059, 26765, 42135, 70225, 80295, 133825, 210675, 283709, 401475, 851127, 1418545, 4255635, 7092725, 21278175]

約数ペア:

[(1, 21278175), (3, 7092725), (5, 4255635), (15, 1418545), (25, 851127), (53, 401475), (75, 283709), (101, 210675), (159, 133825), (265, 80295), (303, 70225), (505, 42135), (795, 26765), (1325, 16059), (1515, 14045), (2525, 8427), (2809, 7575), (3975, 5353)]