18872920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{727}}^1$

素因数の和:808

約数の個数: 64

約数和(自身を含む): 47174400

約数和(自身を除く): 28301480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 59, 88, 110, 118, 220, 236, 295, 440, 472, 590, 649, 727, 1180, 1298, 1454, 2360, 2596, 2908, 3245, 3635, 5192, 5816, 6490, 7270, 7997, 12980, 14540, 15994, 25960, 29080, 31988, 39985, 42893, 63976, 79970, 85786, 159940, 171572, 214465, 319880, 343144, 428930, 471823, 857860, 943646, 1715720, 1887292, 2359115, 3774584, 4718230, 9436460, 18872920]

約数ペア:

[(1, 18872920), (2, 9436460), (4, 4718230), (5, 3774584), (8, 2359115), (10, 1887292), (11, 1715720), (20, 943646), (22, 857860), (40, 471823), (44, 428930), (55, 343144), (59, 319880), (88, 214465), (110, 171572), (118, 159940), (220, 85786), (236, 79970), (295, 63976), (440, 42893), (472, 39985), (590, 31988), (649, 29080), (727, 25960), (1180, 15994), (1298, 14540), (1454, 12980), (2360, 7997), (2596, 7270), (2908, 6490), (3245, 5816), (3635, 5192)]