20493480

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{787}}^1$

素因数の和:839

約数の個数: 128

約数和(自身を含む): 72622080

約数和(自身を除く): 52128600

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 31, 35, 40, 42, 56, 60, 62, 70, 84, 93, 105, 120, 124, 140, 155, 168, 186, 210, 217, 248, 280, 310, 372, 420, 434, 465, 620, 651, 744, 787, 840, 868, 930, 1085, 1240, 1302, 1574, 1736, 1860, 2170, 2361, 2604, 3148, 3255, 3720, 3935, 4340, 4722, 5208, 5509, 6296, 6510, 7870, 8680, 9444, 11018, 11805, 13020, 15740, 16527, 18888, 22036, 23610, 24397, 26040, 27545, 31480, 33054, 44072, 47220, 48794, 55090, 66108, 73191, 82635, 94440, 97588, 110180, 121985, 132216, 146382, 165270, 170779, 195176, 220360, 243970, 292764, 330540, 341558, 365955, 487940, 512337, 585528, 661080, 683116, 731910, 853895, 975880, 1024674, 1366232, 1463820, 1707790, 2049348, 2561685, 2927640, 3415580, 4098696, 5123370, 6831160, 10246740, 20493480]

約数ペア:

[(1, 20493480), (2, 10246740), (3, 6831160), (4, 5123370), (5, 4098696), (6, 3415580), (7, 2927640), (8, 2561685), (10, 2049348), (12, 1707790), (14, 1463820), (15, 1366232), (20, 1024674), (21, 975880), (24, 853895), (28, 731910), (30, 683116), (31, 661080), (35, 585528), (40, 512337), (42, 487940), (56, 365955), (60, 341558), (62, 330540), (70, 292764), (84, 243970), (93, 220360), (105, 195176), (120, 170779), (124, 165270), (140, 146382), (155, 132216), (168, 121985), (186, 110180), (210, 97588), (217, 94440), (248, 82635), (280, 73191), (310, 66108), (372, 55090), (420, 48794), (434, 47220), (465, 44072), (620, 33054), (651, 31480), (744, 27545), (787, 26040), (840, 24397), (868, 23610), (930, 22036), (1085, 18888), (1240, 16527), (1302, 15740), (1574, 13020), (1736, 11805), (1860, 11018), (2170, 9444), (2361, 8680), (2604, 7870), (3148, 6510), (3255, 6296), (3720, 5509), (3935, 5208), (4340, 4722)]