20445425

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1$

素因数の和:103

約数の個数: 96

約数和(自身を含む): 36664320

約数和(自身を除く): 16218895

約数列:

[1, 5, 7, 11, 13, 19, 25, 35, 43, 55, 65, 77, 91, 95, 133, 143, 175, 209, 215, 247, 275, 301, 325, 385, 455, 473, 475, 559, 665, 715, 817, 1001, 1045, 1075, 1235, 1463, 1505, 1729, 1925, 2275, 2365, 2717, 2795, 3311, 3325, 3575, 3913, 4085, 5005, 5225, 5719, 6149, 6175, 7315, 7525, 8645, 8987, 10621, 11825, 13585, 13975, 16555, 19019, 19565, 20425, 25025, 28595, 30745, 36575, 43043, 43225, 44935, 53105, 62909, 67925, 74347, 82775, 95095, 97825, 116831, 142975, 153725, 215215, 224675, 265525, 314545, 371735, 475475, 584155, 817817, 1076075, 1572725, 1858675, 2920775, 4089085, 20445425]

約数ペア:

[(1, 20445425), (5, 4089085), (7, 2920775), (11, 1858675), (13, 1572725), (19, 1076075), (25, 817817), (35, 584155), (43, 475475), (55, 371735), (65, 314545), (77, 265525), (91, 224675), (95, 215215), (133, 153725), (143, 142975), (175, 116831), (209, 97825), (215, 95095), (247, 82775), (275, 74347), (301, 67925), (325, 62909), (385, 53105), (455, 44935), (473, 43225), (475, 43043), (559, 36575), (665, 30745), (715, 28595), (817, 25025), (1001, 20425), (1045, 19565), (1075, 19019), (1235, 16555), (1463, 13975), (1505, 13585), (1729, 11825), (1925, 10621), (2275, 8987), (2365, 8645), (2717, 7525), (2795, 7315), (3311, 6175), (3325, 6149), (3575, 5719), (3913, 5225), (4085, 5005)]