138671680

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1997}}^1$

素因数の和:2052

約数の個数: 112

約数和(自身を含む): 389753856

約数和(自身を除く): 251082176

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 56, 62, 64, 70, 80, 112, 124, 140, 155, 160, 217, 224, 248, 280, 310, 320, 434, 448, 496, 560, 620, 868, 992, 1085, 1120, 1240, 1736, 1984, 1997, 2170, 2240, 2480, 3472, 3994, 4340, 4960, 6944, 7988, 8680, 9920, 9985, 13888, 13979, 15976, 17360, 19970, 27958, 31952, 34720, 39940, 55916, 61907, 63904, 69440, 69895, 79880, 111832, 123814, 127808, 139790, 159760, 223664, 247628, 279580, 309535, 319520, 433349, 447328, 495256, 559160, 619070, 639040, 866698, 894656, 990512, 1118320, 1238140, 1733396, 1981024, 2166745, 2236640, 2476280, 3466792, 3962048, 4333490, 4473280, 4952560, 6933584, 8666980, 9905120, 13867168, 17333960, 19810240, 27734336, 34667920, 69335840, 138671680]

約数ペア:

[(1, 138671680), (2, 69335840), (4, 34667920), (5, 27734336), (7, 19810240), (8, 17333960), (10, 13867168), (14, 9905120), (16, 8666980), (20, 6933584), (28, 4952560), (31, 4473280), (32, 4333490), (35, 3962048), (40, 3466792), (56, 2476280), (62, 2236640), (64, 2166745), (70, 1981024), (80, 1733396), (112, 1238140), (124, 1118320), (140, 990512), (155, 894656), (160, 866698), (217, 639040), (224, 619070), (248, 559160), (280, 495256), (310, 447328), (320, 433349), (434, 319520), (448, 309535), (496, 279580), (560, 247628), (620, 223664), (868, 159760), (992, 139790), (1085, 127808), (1120, 123814), (1240, 111832), (1736, 79880), (1984, 69895), (1997, 69440), (2170, 63904), (2240, 61907), (2480, 55916), (3472, 39940), (3994, 34720), (4340, 31952), (4960, 27958), (6944, 19970), (7988, 17360), (8680, 15976), (9920, 13979), (9985, 13888)]