20465445

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1$

素因数の和:115

約数の個数: 128

約数和(自身を含む): 46448640

約数和(自身を除く): 25983195

約数列:

[1, 3, 5, 7, 11, 13, 15, 21, 29, 33, 35, 39, 47, 55, 65, 77, 87, 91, 105, 141, 143, 145, 165, 195, 203, 231, 235, 273, 319, 329, 377, 385, 429, 435, 455, 517, 609, 611, 705, 715, 957, 987, 1001, 1015, 1131, 1155, 1363, 1365, 1551, 1595, 1645, 1833, 1885, 2145, 2233, 2585, 2639, 3003, 3045, 3055, 3619, 4089, 4147, 4277, 4785, 4935, 5005, 5655, 6699, 6721, 6815, 7755, 7917, 9165, 9541, 10857, 11165, 12441, 12831, 13195, 14993, 15015, 17719, 18095, 20163, 20445, 20735, 21385, 28623, 29029, 33495, 33605, 39585, 44979, 47047, 47705, 53157, 54285, 62205, 64155, 74965, 87087, 88595, 100815, 104951, 124033, 141141, 143115, 145145, 194909, 224895, 235235, 265785, 314853, 372099, 435435, 524755, 584727, 620165, 705705, 974545, 1364363, 1574265, 1860495, 2923635, 4093089, 6821815, 20465445]

約数ペア:

[(1, 20465445), (3, 6821815), (5, 4093089), (7, 2923635), (11, 1860495), (13, 1574265), (15, 1364363), (21, 974545), (29, 705705), (33, 620165), (35, 584727), (39, 524755), (47, 435435), (55, 372099), (65, 314853), (77, 265785), (87, 235235), (91, 224895), (105, 194909), (141, 145145), (143, 143115), (145, 141141), (165, 124033), (195, 104951), (203, 100815), (231, 88595), (235, 87087), (273, 74965), (319, 64155), (329, 62205), (377, 54285), (385, 53157), (429, 47705), (435, 47047), (455, 44979), (517, 39585), (609, 33605), (611, 33495), (705, 29029), (715, 28623), (957, 21385), (987, 20735), (1001, 20445), (1015, 20163), (1131, 18095), (1155, 17719), (1363, 15015), (1365, 14993), (1551, 13195), (1595, 12831), (1645, 12441), (1833, 11165), (1885, 10857), (2145, 9541), (2233, 9165), (2585, 7917), (2639, 7755), (3003, 6815), (3045, 6721), (3055, 6699), (3619, 5655), (4089, 5005), (4147, 4935), (4277, 4785)]