28771990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{277}}^1$

素因数の和:361

約数の個数: 64

約数和(自身を含む): 60528384

約数和(自身を除く): 31756394

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 47, 65, 85, 94, 130, 170, 221, 235, 277, 442, 470, 554, 611, 799, 1105, 1222, 1385, 1598, 2210, 2770, 3055, 3601, 3995, 4709, 6110, 7202, 7990, 9418, 10387, 13019, 18005, 20774, 23545, 26038, 36010, 47090, 51935, 61217, 65095, 103870, 122434, 130190, 169247, 221323, 306085, 338494, 442646, 612170, 846235, 1106615, 1692470, 2213230, 2877199, 5754398, 14385995, 28771990]

約数ペア:

[(1, 28771990), (2, 14385995), (5, 5754398), (10, 2877199), (13, 2213230), (17, 1692470), (26, 1106615), (34, 846235), (47, 612170), (65, 442646), (85, 338494), (94, 306085), (130, 221323), (170, 169247), (221, 130190), (235, 122434), (277, 103870), (442, 65095), (470, 61217), (554, 51935), (611, 47090), (799, 36010), (1105, 26038), (1222, 23545), (1385, 20774), (1598, 18005), (2210, 13019), (2770, 10387), (3055, 9418), (3601, 7990), (3995, 7202), (4709, 6110)]