28721840

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{431}}^1$

素因数の和:475

約数の個数: 120

約数和(自身を含む): 82441152

約数和(自身を除く): 53719312

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 34, 35, 40, 49, 56, 68, 70, 80, 85, 98, 112, 119, 136, 140, 170, 196, 238, 245, 272, 280, 340, 392, 431, 476, 490, 560, 595, 680, 784, 833, 862, 952, 980, 1190, 1360, 1666, 1724, 1904, 1960, 2155, 2380, 3017, 3332, 3448, 3920, 4165, 4310, 4760, 6034, 6664, 6896, 7327, 8330, 8620, 9520, 12068, 13328, 14654, 15085, 16660, 17240, 21119, 24136, 29308, 30170, 33320, 34480, 36635, 42238, 48272, 51289, 58616, 60340, 66640, 73270, 84476, 102578, 105595, 117232, 120680, 146540, 168952, 205156, 211190, 241360, 256445, 293080, 337904, 359023, 410312, 422380, 512890, 586160, 718046, 820624, 844760, 1025780, 1436092, 1689520, 1795115, 2051560, 2872184, 3590230, 4103120, 5744368, 7180460, 14360920, 28721840]

約数ペア:

[(1, 28721840), (2, 14360920), (4, 7180460), (5, 5744368), (7, 4103120), (8, 3590230), (10, 2872184), (14, 2051560), (16, 1795115), (17, 1689520), (20, 1436092), (28, 1025780), (34, 844760), (35, 820624), (40, 718046), (49, 586160), (56, 512890), (68, 422380), (70, 410312), (80, 359023), (85, 337904), (98, 293080), (112, 256445), (119, 241360), (136, 211190), (140, 205156), (170, 168952), (196, 146540), (238, 120680), (245, 117232), (272, 105595), (280, 102578), (340, 84476), (392, 73270), (431, 66640), (476, 60340), (490, 58616), (560, 51289), (595, 48272), (680, 42238), (784, 36635), (833, 34480), (862, 33320), (952, 30170), (980, 29308), (1190, 24136), (1360, 21119), (1666, 17240), (1724, 16660), (1904, 15085), (1960, 14654), (2155, 13328), (2380, 12068), (3017, 9520), (3332, 8620), (3448, 8330), (3920, 7327), (4165, 6896), (4310, 6664), (4760, 6034)]