20579900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{353}}^1$

素因数の和:431

約数の個数: 72

約数和(自身を含む): 49778064

約数和(自身を除く): 29198164

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 53, 55, 100, 106, 110, 212, 220, 265, 275, 353, 530, 550, 583, 706, 1060, 1100, 1166, 1325, 1412, 1765, 2332, 2650, 2915, 3530, 3883, 5300, 5830, 7060, 7766, 8825, 11660, 14575, 15532, 17650, 18709, 19415, 29150, 35300, 37418, 38830, 58300, 74836, 77660, 93545, 97075, 187090, 194150, 205799, 374180, 388300, 411598, 467725, 823196, 935450, 1028995, 1870900, 2057990, 4115980, 5144975, 10289950, 20579900]

約数ペア:

[(1, 20579900), (2, 10289950), (4, 5144975), (5, 4115980), (10, 2057990), (11, 1870900), (20, 1028995), (22, 935450), (25, 823196), (44, 467725), (50, 411598), (53, 388300), (55, 374180), (100, 205799), (106, 194150), (110, 187090), (212, 97075), (220, 93545), (265, 77660), (275, 74836), (353, 58300), (530, 38830), (550, 37418), (583, 35300), (706, 29150), (1060, 19415), (1100, 18709), (1166, 17650), (1325, 15532), (1412, 14575), (1765, 11660), (2332, 8825), (2650, 7766), (2915, 7060), (3530, 5830), (3883, 5300)]