21408290

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{1303}}^1$

素因数の和:1394

約数の個数: 32

約数和(自身を含む): 40559616

約数和(自身を除く): 19151326

約数列:

[1, 2, 5, 10, 31, 53, 62, 106, 155, 265, 310, 530, 1303, 1643, 2606, 3286, 6515, 8215, 13030, 16430, 40393, 69059, 80786, 138118, 201965, 345295, 403930, 690590, 2140829, 4281658, 10704145, 21408290]

約数ペア:

[(1, 21408290), (2, 10704145), (5, 4281658), (10, 2140829), (31, 690590), (53, 403930), (62, 345295), (106, 201965), (155, 138118), (265, 80786), (310, 69059), (530, 40393), (1303, 16430), (1643, 13030), (2606, 8215), (3286, 6515)]