28764520

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{137}}^1\times {\mathrm{181}}^1$

素因数の和:358

約数の個数: 64

約数和(自身を含む): 67813200

約数和(自身を除く): 39048680

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 137, 145, 181, 232, 274, 290, 362, 548, 580, 685, 724, 905, 1096, 1160, 1370, 1448, 1810, 2740, 3620, 3973, 5249, 5480, 7240, 7946, 10498, 15892, 19865, 20996, 24797, 26245, 31784, 39730, 41992, 49594, 52490, 79460, 99188, 104980, 123985, 158920, 198376, 209960, 247970, 495940, 719113, 991880, 1438226, 2876452, 3595565, 5752904, 7191130, 14382260, 28764520]

約数ペア:

[(1, 28764520), (2, 14382260), (4, 7191130), (5, 5752904), (8, 3595565), (10, 2876452), (20, 1438226), (29, 991880), (40, 719113), (58, 495940), (116, 247970), (137, 209960), (145, 198376), (181, 158920), (232, 123985), (274, 104980), (290, 99188), (362, 79460), (548, 52490), (580, 49594), (685, 41992), (724, 39730), (905, 31784), (1096, 26245), (1160, 24797), (1370, 20996), (1448, 19865), (1810, 15892), (2740, 10498), (3620, 7946), (3973, 7240), (5249, 5480)]