20404575

素因数分解:

$3^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:118

約数の個数: 96

約数和(自身を含む): 41465600

約数和(自身を除く): 21061025

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 37, 43, 45, 57, 75, 95, 111, 129, 135, 171, 185, 215, 225, 285, 333, 387, 475, 513, 555, 645, 675, 703, 817, 855, 925, 999, 1075, 1161, 1425, 1591, 1665, 1935, 2109, 2451, 2565, 2775, 3225, 3515, 4085, 4275, 4773, 4995, 5805, 6327, 7353, 7955, 8325, 9675, 10545, 12255, 12825, 14319, 17575, 18981, 20425, 22059, 23865, 24975, 29025, 30229, 31635, 36765, 39775, 42957, 52725, 61275, 71595, 90687, 94905, 110295, 119325, 151145, 158175, 183825, 214785, 272061, 357975, 453435, 474525, 551475, 755725, 816183, 1073925, 1360305, 2267175, 4080915, 6801525, 20404575]

約数ペア:

[(1, 20404575), (3, 6801525), (5, 4080915), (9, 2267175), (15, 1360305), (19, 1073925), (25, 816183), (27, 755725), (37, 551475), (43, 474525), (45, 453435), (57, 357975), (75, 272061), (95, 214785), (111, 183825), (129, 158175), (135, 151145), (171, 119325), (185, 110295), (215, 94905), (225, 90687), (285, 71595), (333, 61275), (387, 52725), (475, 42957), (513, 39775), (555, 36765), (645, 31635), (675, 30229), (703, 29025), (817, 24975), (855, 23865), (925, 22059), (999, 20425), (1075, 18981), (1161, 17575), (1425, 14319), (1591, 12825), (1665, 12255), (1935, 10545), (2109, 9675), (2451, 8325), (2565, 7955), (2775, 7353), (3225, 6327), (3515, 5805), (4085, 4995), (4275, 4773)]