21802025

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 33331200

約数和(自身を除く): 11529175

約数列:

[1, 5, 7, 19, 25, 35, 79, 83, 95, 133, 175, 395, 415, 475, 553, 581, 665, 1501, 1577, 1975, 2075, 2765, 2905, 3325, 6557, 7505, 7885, 10507, 11039, 13825, 14525, 32785, 37525, 39425, 45899, 52535, 55195, 124583, 163925, 229495, 262675, 275975, 622915, 872081, 1147475, 3114575, 4360405, 21802025]

約数ペア:

[(1, 21802025), (5, 4360405), (7, 3114575), (19, 1147475), (25, 872081), (35, 622915), (79, 275975), (83, 262675), (95, 229495), (133, 163925), (175, 124583), (395, 55195), (415, 52535), (475, 45899), (553, 39425), (581, 37525), (665, 32785), (1501, 14525), (1577, 13825), (1975, 11039), (2075, 10507), (2765, 7885), (2905, 7505), (3325, 6557)]