20519240

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{19}}^2\times {\mathrm{29}}^1$

素因数の和:92

約数の個数: 144

約数和(自身を含む): 58635900

約数和(自身を除く): 38116660

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 29, 35, 38, 40, 49, 56, 58, 70, 76, 95, 98, 116, 133, 140, 145, 152, 190, 196, 203, 232, 245, 266, 280, 290, 361, 380, 392, 406, 490, 532, 551, 580, 665, 722, 760, 812, 931, 980, 1015, 1064, 1102, 1160, 1330, 1421, 1444, 1624, 1805, 1862, 1960, 2030, 2204, 2527, 2660, 2755, 2842, 2888, 3610, 3724, 3857, 4060, 4408, 4655, 5054, 5320, 5510, 5684, 7105, 7220, 7448, 7714, 8120, 9310, 10108, 10469, 11020, 11368, 12635, 14210, 14440, 15428, 17689, 18620, 19285, 20216, 20938, 22040, 25270, 26999, 28420, 30856, 35378, 37240, 38570, 41876, 50540, 52345, 53998, 56840, 70756, 73283, 77140, 83752, 88445, 101080, 104690, 107996, 134995, 141512, 146566, 154280, 176890, 209380, 215992, 269990, 293132, 353780, 366415, 418760, 512981, 539980, 586264, 707560, 732830, 1025962, 1079960, 1465660, 2051924, 2564905, 2931320, 4103848, 5129810, 10259620, 20519240]

約数ペア:

[(1, 20519240), (2, 10259620), (4, 5129810), (5, 4103848), (7, 2931320), (8, 2564905), (10, 2051924), (14, 1465660), (19, 1079960), (20, 1025962), (28, 732830), (29, 707560), (35, 586264), (38, 539980), (40, 512981), (49, 418760), (56, 366415), (58, 353780), (70, 293132), (76, 269990), (95, 215992), (98, 209380), (116, 176890), (133, 154280), (140, 146566), (145, 141512), (152, 134995), (190, 107996), (196, 104690), (203, 101080), (232, 88445), (245, 83752), (266, 77140), (280, 73283), (290, 70756), (361, 56840), (380, 53998), (392, 52345), (406, 50540), (490, 41876), (532, 38570), (551, 37240), (580, 35378), (665, 30856), (722, 28420), (760, 26999), (812, 25270), (931, 22040), (980, 20938), (1015, 20216), (1064, 19285), (1102, 18620), (1160, 17689), (1330, 15428), (1421, 14440), (1444, 14210), (1624, 12635), (1805, 11368), (1862, 11020), (1960, 10469), (2030, 10108), (2204, 9310), (2527, 8120), (2660, 7714), (2755, 7448), (2842, 7220), (2888, 7105), (3610, 5684), (3724, 5510), (3857, 5320), (4060, 5054), (4408, 4655)]