21204690

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{54371}}^1$

素因数の和:54394

約数の個数: 32

約数和(自身を含む): 54806976

約数和(自身を除く): 33602286

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 54371, 108742, 163113, 271855, 326226, 543710, 706823, 815565, 1413646, 1631130, 2120469, 3534115, 4240938, 7068230, 10602345, 21204690]

約数ペア:

[(1, 21204690), (2, 10602345), (3, 7068230), (5, 4240938), (6, 3534115), (10, 2120469), (13, 1631130), (15, 1413646), (26, 815565), (30, 706823), (39, 543710), (65, 326226), (78, 271855), (130, 163113), (195, 108742), (390, 54371)]