208131520

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{20981}}^1$

素因数の和:21029

約数の個数: 56

約数和(自身を含む): 511625088

約数和(自身を除く): 303493568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 2480, 4960, 9920, 20981, 41962, 83924, 104905, 167848, 209810, 335696, 419620, 650411, 671392, 839240, 1300822, 1342784, 1678480, 2601644, 3252055, 3356960, 5203288, 6504110, 6713920, 10406576, 13008220, 20813152, 26016440, 41626304, 52032880, 104065760, 208131520]

約数ペア:

[(1, 208131520), (2, 104065760), (4, 52032880), (5, 41626304), (8, 26016440), (10, 20813152), (16, 13008220), (20, 10406576), (31, 6713920), (32, 6504110), (40, 5203288), (62, 3356960), (64, 3252055), (80, 2601644), (124, 1678480), (155, 1342784), (160, 1300822), (248, 839240), (310, 671392), (320, 650411), (496, 419620), (620, 335696), (992, 209810), (1240, 167848), (1984, 104905), (2480, 83924), (4960, 41962), (9920, 20981)]