28978740

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{211}}^1$

素因数の和:342

約数の個数: 144

約数和(自身を含む): 101861760

約数和(自身を除く): 72883020

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 109, 126, 140, 180, 210, 211, 218, 252, 315, 327, 420, 422, 436, 545, 630, 633, 654, 763, 844, 981, 1055, 1090, 1260, 1266, 1308, 1477, 1526, 1635, 1899, 1962, 2110, 2180, 2289, 2532, 2954, 3052, 3165, 3270, 3798, 3815, 3924, 4220, 4431, 4578, 4905, 5908, 6330, 6540, 6867, 7385, 7596, 7630, 8862, 9156, 9495, 9810, 11445, 12660, 13293, 13734, 14770, 15260, 17724, 18990, 19620, 22155, 22890, 22999, 26586, 27468, 29540, 34335, 37980, 44310, 45780, 45998, 53172, 66465, 68670, 68997, 88620, 91996, 114995, 132930, 137340, 137994, 160993, 206991, 229990, 265860, 275988, 321986, 344985, 413982, 459980, 482979, 643972, 689970, 804965, 827964, 965958, 1034955, 1379940, 1448937, 1609930, 1931916, 2069910, 2414895, 2897874, 3219860, 4139820, 4829790, 5795748, 7244685, 9659580, 14489370, 28978740]

約数ペア:

[(1, 28978740), (2, 14489370), (3, 9659580), (4, 7244685), (5, 5795748), (6, 4829790), (7, 4139820), (9, 3219860), (10, 2897874), (12, 2414895), (14, 2069910), (15, 1931916), (18, 1609930), (20, 1448937), (21, 1379940), (28, 1034955), (30, 965958), (35, 827964), (36, 804965), (42, 689970), (45, 643972), (60, 482979), (63, 459980), (70, 413982), (84, 344985), (90, 321986), (105, 275988), (109, 265860), (126, 229990), (140, 206991), (180, 160993), (210, 137994), (211, 137340), (218, 132930), (252, 114995), (315, 91996), (327, 88620), (420, 68997), (422, 68670), (436, 66465), (545, 53172), (630, 45998), (633, 45780), (654, 44310), (763, 37980), (844, 34335), (981, 29540), (1055, 27468), (1090, 26586), (1260, 22999), (1266, 22890), (1308, 22155), (1477, 19620), (1526, 18990), (1635, 17724), (1899, 15260), (1962, 14770), (2110, 13734), (2180, 13293), (2289, 12660), (2532, 11445), (2954, 9810), (3052, 9495), (3165, 9156), (3270, 8862), (3798, 7630), (3815, 7596), (3924, 7385), (4220, 6867), (4431, 6540), (4578, 6330), (4905, 5908)]