216977985

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{821}}^1\times {\mathrm{839}}^1$

素因数の和:1678

約数の個数: 48

約数和(自身を含む): 430859520

約数和(自身を除く): 213881535

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 821, 839, 2463, 2517, 4105, 4195, 5747, 5873, 7389, 7551, 12315, 12585, 17241, 17619, 28735, 29365, 36945, 37755, 51723, 52857, 86205, 88095, 258615, 264285, 688819, 2066457, 3444095, 4821733, 6199371, 10332285, 14465199, 24108665, 30996855, 43395597, 72325995, 216977985]

約数ペア:

[(1, 216977985), (3, 72325995), (5, 43395597), (7, 30996855), (9, 24108665), (15, 14465199), (21, 10332285), (35, 6199371), (45, 4821733), (63, 3444095), (105, 2066457), (315, 688819), (821, 264285), (839, 258615), (2463, 88095), (2517, 86205), (4105, 52857), (4195, 51723), (5747, 37755), (5873, 36945), (7389, 29365), (7551, 28735), (12315, 17619), (12585, 17241)]