28545720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1999}}^1$

素因数の和:2037

約数の個数: 128

約数和(自身を含む): 103680000

約数和(自身を除く): 75134280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 51, 56, 60, 68, 70, 84, 85, 102, 105, 119, 120, 136, 140, 168, 170, 204, 210, 238, 255, 280, 340, 357, 408, 420, 476, 510, 595, 680, 714, 840, 952, 1020, 1190, 1428, 1785, 1999, 2040, 2380, 2856, 3570, 3998, 4760, 5997, 7140, 7996, 9995, 11994, 13993, 14280, 15992, 19990, 23988, 27986, 29985, 33983, 39980, 41979, 47976, 55972, 59970, 67966, 69965, 79960, 83958, 101949, 111944, 119940, 135932, 139930, 167916, 169915, 203898, 209895, 237881, 239880, 271864, 279860, 335832, 339830, 407796, 419790, 475762, 509745, 559720, 679660, 713643, 815592, 839580, 951524, 1019490, 1189405, 1359320, 1427286, 1679160, 1903048, 2038980, 2378810, 2854572, 3568215, 4077960, 4757620, 5709144, 7136430, 9515240, 14272860, 28545720]

約数ペア:

[(1, 28545720), (2, 14272860), (3, 9515240), (4, 7136430), (5, 5709144), (6, 4757620), (7, 4077960), (8, 3568215), (10, 2854572), (12, 2378810), (14, 2038980), (15, 1903048), (17, 1679160), (20, 1427286), (21, 1359320), (24, 1189405), (28, 1019490), (30, 951524), (34, 839580), (35, 815592), (40, 713643), (42, 679660), (51, 559720), (56, 509745), (60, 475762), (68, 419790), (70, 407796), (84, 339830), (85, 335832), (102, 279860), (105, 271864), (119, 239880), (120, 237881), (136, 209895), (140, 203898), (168, 169915), (170, 167916), (204, 139930), (210, 135932), (238, 119940), (255, 111944), (280, 101949), (340, 83958), (357, 79960), (408, 69965), (420, 67966), (476, 59970), (510, 55972), (595, 47976), (680, 41979), (714, 39980), (840, 33983), (952, 29985), (1020, 27986), (1190, 23988), (1428, 19990), (1785, 15992), (1999, 14280), (2040, 13993), (2380, 11994), (2856, 9995), (3570, 7996), (3998, 7140), (4760, 5997)]