28112920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{353}}^1$

素因数の和:556

約数の個数: 64

約数和(自身を含む): 69582240

約数和(自身を除く): 41469320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 181, 220, 353, 362, 440, 706, 724, 905, 1412, 1448, 1765, 1810, 1991, 2824, 3530, 3620, 3883, 3982, 7060, 7240, 7766, 7964, 9955, 14120, 15532, 15928, 19415, 19910, 31064, 38830, 39820, 63893, 77660, 79640, 127786, 155320, 255572, 319465, 511144, 638930, 702823, 1277860, 1405646, 2555720, 2811292, 3514115, 5622584, 7028230, 14056460, 28112920]

約数ペア:

[(1, 28112920), (2, 14056460), (4, 7028230), (5, 5622584), (8, 3514115), (10, 2811292), (11, 2555720), (20, 1405646), (22, 1277860), (40, 702823), (44, 638930), (55, 511144), (88, 319465), (110, 255572), (181, 155320), (220, 127786), (353, 79640), (362, 77660), (440, 63893), (706, 39820), (724, 38830), (905, 31064), (1412, 19910), (1448, 19415), (1765, 15928), (1810, 15532), (1991, 14120), (2824, 9955), (3530, 7964), (3620, 7766), (3883, 7240), (3982, 7060)]