28006660

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:265

約数の個数: 72

約数和(自身を含む): 65959488

約数和(自身を除く): 37952828

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 121, 142, 163, 220, 242, 284, 326, 355, 484, 605, 652, 710, 781, 815, 1210, 1420, 1562, 1630, 1793, 2420, 3124, 3260, 3586, 3905, 7172, 7810, 8591, 8965, 11573, 15620, 17182, 17930, 19723, 23146, 34364, 35860, 39446, 42955, 46292, 57865, 78892, 85910, 98615, 115730, 127303, 171820, 197230, 231460, 254606, 394460, 509212, 636515, 1273030, 1400333, 2546060, 2800666, 5601332, 7001665, 14003330, 28006660]

約数ペア:

[(1, 28006660), (2, 14003330), (4, 7001665), (5, 5601332), (10, 2800666), (11, 2546060), (20, 1400333), (22, 1273030), (44, 636515), (55, 509212), (71, 394460), (110, 254606), (121, 231460), (142, 197230), (163, 171820), (220, 127303), (242, 115730), (284, 98615), (326, 85910), (355, 78892), (484, 57865), (605, 46292), (652, 42955), (710, 39446), (781, 35860), (815, 34364), (1210, 23146), (1420, 19723), (1562, 17930), (1630, 17182), (1793, 15620), (2420, 11573), (3124, 8965), (3260, 8591), (3586, 7810), (3905, 7172)]