19815880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{181}}^1$

素因数の和:239

約数の個数: 128

約数和(自身を含む): 56609280

約数和(自身を除く): 36793400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 23, 28, 34, 35, 40, 46, 56, 68, 70, 85, 92, 115, 119, 136, 140, 161, 170, 181, 184, 230, 238, 280, 322, 340, 362, 391, 460, 476, 595, 644, 680, 724, 782, 805, 905, 920, 952, 1190, 1267, 1288, 1448, 1564, 1610, 1810, 1955, 2380, 2534, 2737, 3077, 3128, 3220, 3620, 3910, 4163, 4760, 5068, 5474, 6154, 6335, 6440, 7240, 7820, 8326, 10136, 10948, 12308, 12670, 13685, 15385, 15640, 16652, 20815, 21539, 21896, 24616, 25340, 27370, 29141, 30770, 33304, 41630, 43078, 50680, 54740, 58282, 61540, 70771, 83260, 86156, 107695, 109480, 116564, 123080, 141542, 145705, 166520, 172312, 215390, 233128, 283084, 291410, 353855, 430780, 495397, 566168, 582820, 707710, 861560, 990794, 1165640, 1415420, 1981588, 2476985, 2830840, 3963176, 4953970, 9907940, 19815880]

約数ペア:

[(1, 19815880), (2, 9907940), (4, 4953970), (5, 3963176), (7, 2830840), (8, 2476985), (10, 1981588), (14, 1415420), (17, 1165640), (20, 990794), (23, 861560), (28, 707710), (34, 582820), (35, 566168), (40, 495397), (46, 430780), (56, 353855), (68, 291410), (70, 283084), (85, 233128), (92, 215390), (115, 172312), (119, 166520), (136, 145705), (140, 141542), (161, 123080), (170, 116564), (181, 109480), (184, 107695), (230, 86156), (238, 83260), (280, 70771), (322, 61540), (340, 58282), (362, 54740), (391, 50680), (460, 43078), (476, 41630), (595, 33304), (644, 30770), (680, 29141), (724, 27370), (782, 25340), (805, 24616), (905, 21896), (920, 21539), (952, 20815), (1190, 16652), (1267, 15640), (1288, 15385), (1448, 13685), (1564, 12670), (1610, 12308), (1810, 10948), (1955, 10136), (2380, 8326), (2534, 7820), (2737, 7240), (3077, 6440), (3128, 6335), (3220, 6154), (3620, 5474), (3910, 5068), (4163, 4760)]