21289275

素因数分解:

$3^2\times 5^2\times 7^2\times {\mathrm{1931}}^1$

素因数の和:1961

約数の個数: 54

約数和(自身を含む): 44379972

約数和(自身を除く): 23090697

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 49, 63, 75, 105, 147, 175, 225, 245, 315, 441, 525, 735, 1225, 1575, 1931, 2205, 3675, 5793, 9655, 11025, 13517, 17379, 28965, 40551, 48275, 67585, 86895, 94619, 121653, 144825, 202755, 283857, 337925, 434475, 473095, 608265, 851571, 1013775, 1419285, 2365475, 3041325, 4257855, 7096425, 21289275]

約数ペア:

[(1, 21289275), (3, 7096425), (5, 4257855), (7, 3041325), (9, 2365475), (15, 1419285), (21, 1013775), (25, 851571), (35, 608265), (45, 473095), (49, 434475), (63, 337925), (75, 283857), (105, 202755), (147, 144825), (175, 121653), (225, 94619), (245, 86895), (315, 67585), (441, 48275), (525, 40551), (735, 28965), (1225, 17379), (1575, 13517), (1931, 11025), (2205, 9655), (3675, 5793)]