21407230

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{239}}^1$

素因数の和:325

約数の個数: 48

約数和(自身を含む): 42690240

約数和(自身を除く): 21283010

約数列:

[1, 2, 5, 10, 13, 26, 53, 65, 106, 130, 169, 239, 265, 338, 478, 530, 689, 845, 1195, 1378, 1690, 2390, 3107, 3445, 6214, 6890, 8957, 12667, 15535, 17914, 25334, 31070, 40391, 44785, 63335, 80782, 89570, 126670, 164671, 201955, 329342, 403910, 823355, 1646710, 2140723, 4281446, 10703615, 21407230]

約数ペア:

[(1, 21407230), (2, 10703615), (5, 4281446), (10, 2140723), (13, 1646710), (26, 823355), (53, 403910), (65, 329342), (106, 201955), (130, 164671), (169, 126670), (239, 89570), (265, 80782), (338, 63335), (478, 44785), (530, 40391), (689, 31070), (845, 25334), (1195, 17914), (1378, 15535), (1690, 12667), (2390, 8957), (3107, 6890), (3445, 6214)]