21286935

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{193}}^1$

素因数の和:269

約数の個数: 64

約数和(自身を含む): 40972800

約数和(自身を除く): 19685865

約数列:

[1, 3, 5, 9, 15, 19, 27, 43, 45, 57, 95, 129, 135, 171, 193, 215, 285, 387, 513, 579, 645, 817, 855, 965, 1161, 1737, 1935, 2451, 2565, 2895, 3667, 4085, 5211, 5805, 7353, 8299, 8685, 11001, 12255, 18335, 22059, 24897, 26055, 33003, 36765, 41495, 55005, 74691, 99009, 110295, 124485, 157681, 165015, 224073, 373455, 473043, 495045, 788405, 1120365, 1419129, 2365215, 4257387, 7095645, 21286935]

約数ペア:

[(1, 21286935), (3, 7095645), (5, 4257387), (9, 2365215), (15, 1419129), (19, 1120365), (27, 788405), (43, 495045), (45, 473043), (57, 373455), (95, 224073), (129, 165015), (135, 157681), (171, 124485), (193, 110295), (215, 99009), (285, 74691), (387, 55005), (513, 41495), (579, 36765), (645, 33003), (817, 26055), (855, 24897), (965, 22059), (1161, 18335), (1737, 12255), (1935, 11001), (2451, 8685), (2565, 8299), (2895, 7353), (3667, 5805), (4085, 5211)]