21935420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{353}}^1$

素因数の和:614

約数の個数: 48

約数和(自身を含む): 49956480

約数和(自身を除く): 28021060

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 239, 260, 353, 478, 706, 956, 1195, 1412, 1765, 2390, 3107, 3530, 4589, 4780, 6214, 7060, 9178, 12428, 15535, 18356, 22945, 31070, 45890, 62140, 84367, 91780, 168734, 337468, 421835, 843670, 1096771, 1687340, 2193542, 4387084, 5483855, 10967710, 21935420]

約数ペア:

[(1, 21935420), (2, 10967710), (4, 5483855), (5, 4387084), (10, 2193542), (13, 1687340), (20, 1096771), (26, 843670), (52, 421835), (65, 337468), (130, 168734), (239, 91780), (260, 84367), (353, 62140), (478, 45890), (706, 31070), (956, 22945), (1195, 18356), (1412, 15535), (1765, 12428), (2390, 9178), (3107, 7060), (3530, 6214), (4589, 4780)]