20719920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{229}}^1$

素因数の和:287

約数の個数: 160

約数和(自身を含む): 71870400

約数和(自身を除く): 51150480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 29, 30, 39, 40, 48, 52, 58, 60, 65, 78, 80, 87, 104, 116, 120, 130, 145, 156, 174, 195, 208, 229, 232, 240, 260, 290, 312, 348, 377, 390, 435, 458, 464, 520, 580, 624, 687, 696, 754, 780, 870, 916, 1040, 1131, 1145, 1160, 1374, 1392, 1508, 1560, 1740, 1832, 1885, 2262, 2290, 2320, 2748, 2977, 3016, 3120, 3435, 3480, 3664, 3770, 4524, 4580, 5496, 5655, 5954, 6032, 6641, 6870, 6960, 7540, 8931, 9048, 9160, 10992, 11310, 11908, 13282, 13740, 14885, 15080, 17862, 18096, 18320, 19923, 22620, 23816, 26564, 27480, 29770, 30160, 33205, 35724, 39846, 44655, 45240, 47632, 53128, 54960, 59540, 66410, 71448, 79692, 86333, 89310, 90480, 99615, 106256, 119080, 132820, 142896, 159384, 172666, 178620, 199230, 238160, 258999, 265640, 318768, 345332, 357240, 398460, 431665, 517998, 531280, 690664, 714480, 796920, 863330, 1035996, 1294995, 1381328, 1593840, 1726660, 2071992, 2589990, 3453320, 4143984, 5179980, 6906640, 10359960, 20719920]

約数ペア:

[(1, 20719920), (2, 10359960), (3, 6906640), (4, 5179980), (5, 4143984), (6, 3453320), (8, 2589990), (10, 2071992), (12, 1726660), (13, 1593840), (15, 1381328), (16, 1294995), (20, 1035996), (24, 863330), (26, 796920), (29, 714480), (30, 690664), (39, 531280), (40, 517998), (48, 431665), (52, 398460), (58, 357240), (60, 345332), (65, 318768), (78, 265640), (80, 258999), (87, 238160), (104, 199230), (116, 178620), (120, 172666), (130, 159384), (145, 142896), (156, 132820), (174, 119080), (195, 106256), (208, 99615), (229, 90480), (232, 89310), (240, 86333), (260, 79692), (290, 71448), (312, 66410), (348, 59540), (377, 54960), (390, 53128), (435, 47632), (458, 45240), (464, 44655), (520, 39846), (580, 35724), (624, 33205), (687, 30160), (696, 29770), (754, 27480), (780, 26564), (870, 23816), (916, 22620), (1040, 19923), (1131, 18320), (1145, 18096), (1160, 17862), (1374, 15080), (1392, 14885), (1508, 13740), (1560, 13282), (1740, 11908), (1832, 11310), (1885, 10992), (2262, 9160), (2290, 9048), (2320, 8931), (2748, 7540), (2977, 6960), (3016, 6870), (3120, 6641), (3435, 6032), (3480, 5954), (3664, 5655), (3770, 5496), (4524, 4580)]