19811680

素因数分解:

$2^5\times 5^1\times 7^3\times {\mathrm{19}}^2$

素因数の和:74

約数の個数: 144

約数和(自身を含む): 57607200

約数和(自身を除く): 37795520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 32, 35, 38, 40, 49, 56, 70, 76, 80, 95, 98, 112, 133, 140, 152, 160, 190, 196, 224, 245, 266, 280, 304, 343, 361, 380, 392, 490, 532, 560, 608, 665, 686, 722, 760, 784, 931, 980, 1064, 1120, 1330, 1372, 1444, 1520, 1568, 1715, 1805, 1862, 1960, 2128, 2527, 2660, 2744, 2888, 3040, 3430, 3610, 3724, 3920, 4256, 4655, 5054, 5320, 5488, 5776, 6517, 6860, 7220, 7448, 7840, 9310, 10108, 10640, 10976, 11552, 12635, 13034, 13720, 14440, 14896, 17689, 18620, 20216, 21280, 25270, 26068, 27440, 28880, 29792, 32585, 35378, 37240, 40432, 50540, 52136, 54880, 57760, 65170, 70756, 74480, 80864, 88445, 101080, 104272, 123823, 130340, 141512, 148960, 176890, 202160, 208544, 247646, 260680, 283024, 353780, 404320, 495292, 521360, 566048, 619115, 707560, 990584, 1042720, 1238230, 1415120, 1981168, 2476460, 2830240, 3962336, 4952920, 9905840, 19811680]

約数ペア:

[(1, 19811680), (2, 9905840), (4, 4952920), (5, 3962336), (7, 2830240), (8, 2476460), (10, 1981168), (14, 1415120), (16, 1238230), (19, 1042720), (20, 990584), (28, 707560), (32, 619115), (35, 566048), (38, 521360), (40, 495292), (49, 404320), (56, 353780), (70, 283024), (76, 260680), (80, 247646), (95, 208544), (98, 202160), (112, 176890), (133, 148960), (140, 141512), (152, 130340), (160, 123823), (190, 104272), (196, 101080), (224, 88445), (245, 80864), (266, 74480), (280, 70756), (304, 65170), (343, 57760), (361, 54880), (380, 52136), (392, 50540), (490, 40432), (532, 37240), (560, 35378), (608, 32585), (665, 29792), (686, 28880), (722, 27440), (760, 26068), (784, 25270), (931, 21280), (980, 20216), (1064, 18620), (1120, 17689), (1330, 14896), (1372, 14440), (1444, 13720), (1520, 13034), (1568, 12635), (1715, 11552), (1805, 10976), (1862, 10640), (1960, 10108), (2128, 9310), (2527, 7840), (2660, 7448), (2744, 7220), (2888, 6860), (3040, 6517), (3430, 5776), (3610, 5488), (3724, 5320), (3920, 5054), (4256, 4655)]