399369280

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{317}}^1$

素因数の和:492

約数の個数: 112

約数和(自身を含む): 992526336

約数和(自身を除く): 593157056

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 127, 155, 160, 248, 254, 310, 317, 320, 496, 508, 620, 634, 635, 992, 1016, 1240, 1268, 1270, 1585, 1984, 2032, 2480, 2536, 2540, 3170, 3937, 4064, 4960, 5072, 5080, 6340, 7874, 8128, 9827, 9920, 10144, 10160, 12680, 15748, 19654, 19685, 20288, 20320, 25360, 31496, 39308, 39370, 40259, 40640, 49135, 50720, 62992, 78616, 78740, 80518, 98270, 101440, 125984, 157232, 157480, 161036, 196540, 201295, 251968, 314464, 314960, 322072, 393080, 402590, 628928, 629920, 644144, 786160, 805180, 1248029, 1259840, 1288288, 1572320, 1610360, 2496058, 2576576, 3144640, 3220720, 4992116, 6240145, 6441440, 9984232, 12480290, 12882880, 19968464, 24960580, 39936928, 49921160, 79873856, 99842320, 199684640, 399369280]

約数ペア:

[(1, 399369280), (2, 199684640), (4, 99842320), (5, 79873856), (8, 49921160), (10, 39936928), (16, 24960580), (20, 19968464), (31, 12882880), (32, 12480290), (40, 9984232), (62, 6441440), (64, 6240145), (80, 4992116), (124, 3220720), (127, 3144640), (155, 2576576), (160, 2496058), (248, 1610360), (254, 1572320), (310, 1288288), (317, 1259840), (320, 1248029), (496, 805180), (508, 786160), (620, 644144), (634, 629920), (635, 628928), (992, 402590), (1016, 393080), (1240, 322072), (1268, 314960), (1270, 314464), (1585, 251968), (1984, 201295), (2032, 196540), (2480, 161036), (2536, 157480), (2540, 157232), (3170, 125984), (3937, 101440), (4064, 98270), (4960, 80518), (5072, 78740), (5080, 78616), (6340, 62992), (7874, 50720), (8128, 49135), (9827, 40640), (9920, 40259), (10144, 39370), (10160, 39308), (12680, 31496), (15748, 25360), (19654, 20320), (19685, 20288)]