20156640

素因数分解:

$2^5\times 3^1\times 5^1\times 7^2\times {\mathrm{857}}^1$

素因数の和:889

約数の個数: 144

約数和(自身を含む): 73945872

約数和(自身を除く): 53789232

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 49, 56, 60, 70, 80, 84, 96, 98, 105, 112, 120, 140, 147, 160, 168, 196, 210, 224, 240, 245, 280, 294, 336, 392, 420, 480, 490, 560, 588, 672, 735, 784, 840, 857, 980, 1120, 1176, 1470, 1568, 1680, 1714, 1960, 2352, 2571, 2940, 3360, 3428, 3920, 4285, 4704, 5142, 5880, 5999, 6856, 7840, 8570, 10284, 11760, 11998, 12855, 13712, 17140, 17997, 20568, 23520, 23996, 25710, 27424, 29995, 34280, 35994, 41136, 41993, 47992, 51420, 59990, 68560, 71988, 82272, 83986, 89985, 95984, 102840, 119980, 125979, 137120, 143976, 167972, 179970, 191968, 205680, 209965, 239960, 251958, 287952, 335944, 359940, 411360, 419930, 479920, 503916, 575904, 629895, 671888, 719880, 839860, 959840, 1007832, 1259790, 1343776, 1439760, 1679720, 2015664, 2519580, 2879520, 3359440, 4031328, 5039160, 6718880, 10078320, 20156640]

約数ペア:

[(1, 20156640), (2, 10078320), (3, 6718880), (4, 5039160), (5, 4031328), (6, 3359440), (7, 2879520), (8, 2519580), (10, 2015664), (12, 1679720), (14, 1439760), (15, 1343776), (16, 1259790), (20, 1007832), (21, 959840), (24, 839860), (28, 719880), (30, 671888), (32, 629895), (35, 575904), (40, 503916), (42, 479920), (48, 419930), (49, 411360), (56, 359940), (60, 335944), (70, 287952), (80, 251958), (84, 239960), (96, 209965), (98, 205680), (105, 191968), (112, 179970), (120, 167972), (140, 143976), (147, 137120), (160, 125979), (168, 119980), (196, 102840), (210, 95984), (224, 89985), (240, 83986), (245, 82272), (280, 71988), (294, 68560), (336, 59990), (392, 51420), (420, 47992), (480, 41993), (490, 41136), (560, 35994), (588, 34280), (672, 29995), (735, 27424), (784, 25710), (840, 23996), (857, 23520), (980, 20568), (1120, 17997), (1176, 17140), (1470, 13712), (1568, 12855), (1680, 11998), (1714, 11760), (1960, 10284), (2352, 8570), (2571, 7840), (2940, 6856), (3360, 5999), (3428, 5880), (3920, 5142), (4285, 4704)]