21048465

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{419}}^1$

素因数の和:641

約数の個数: 32

約数和(自身を含む): 35925120

約数和(自身を除く): 14876655

約数列:

[1, 3, 5, 15, 17, 51, 85, 197, 255, 419, 591, 985, 1257, 2095, 2955, 3349, 6285, 7123, 10047, 16745, 21369, 35615, 50235, 82543, 106845, 247629, 412715, 1238145, 1403231, 4209693, 7016155, 21048465]

約数ペア:

[(1, 21048465), (3, 7016155), (5, 4209693), (15, 1403231), (17, 1238145), (51, 412715), (85, 247629), (197, 106845), (255, 82543), (419, 50235), (591, 35615), (985, 21369), (1257, 16745), (2095, 10047), (2955, 7123), (3349, 6285)]