21253375

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1$

素因数の和:109

約数の個数: 64

約数和(自身を含む): 33022080

約数和(自身を除く): 11768705

約数列:

[1, 5, 11, 13, 25, 29, 41, 55, 65, 125, 143, 145, 205, 275, 319, 325, 377, 451, 533, 715, 725, 1025, 1189, 1375, 1595, 1625, 1885, 2255, 2665, 3575, 3625, 4147, 5125, 5863, 5945, 7975, 9425, 11275, 13079, 13325, 15457, 17875, 20735, 29315, 29725, 39875, 47125, 56375, 65395, 66625, 77285, 103675, 146575, 148625, 170027, 326975, 386425, 518375, 732875, 850135, 1634875, 1932125, 4250675, 21253375]

約数ペア:

[(1, 21253375), (5, 4250675), (11, 1932125), (13, 1634875), (25, 850135), (29, 732875), (41, 518375), (55, 386425), (65, 326975), (125, 170027), (143, 148625), (145, 146575), (205, 103675), (275, 77285), (319, 66625), (325, 65395), (377, 56375), (451, 47125), (533, 39875), (715, 29725), (725, 29315), (1025, 20735), (1189, 17875), (1375, 15457), (1595, 13325), (1625, 13079), (1885, 11275), (2255, 9425), (2665, 7975), (3575, 5945), (3625, 5863), (4147, 5125)]