19968975

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{6827}}^1$

素因数の和:6856

約数の個数: 36

約数和(自身を含む): 38523576

約数和(自身を除く): 18554601

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 117, 195, 225, 325, 585, 975, 2925, 6827, 20481, 34135, 61443, 88751, 102405, 170675, 266253, 307215, 443755, 512025, 798759, 1331265, 1536075, 2218775, 3993795, 6656325, 19968975]

約数ペア:

[(1, 19968975), (3, 6656325), (5, 3993795), (9, 2218775), (13, 1536075), (15, 1331265), (25, 798759), (39, 512025), (45, 443755), (65, 307215), (75, 266253), (117, 170675), (195, 102405), (225, 88751), (325, 61443), (585, 34135), (975, 20481), (2925, 6827)]