1680640

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1$

素因数の和:135

約数の個数: 72

約数和(自身を含む): 4378248

約数和(自身を除く): 2697608

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 101, 104, 128, 130, 160, 202, 208, 256, 260, 320, 404, 416, 505, 520, 640, 808, 832, 1010, 1040, 1280, 1313, 1616, 1664, 2020, 2080, 2626, 3232, 3328, 4040, 4160, 5252, 6464, 6565, 8080, 8320, 10504, 12928, 13130, 16160, 16640, 21008, 25856, 26260, 32320, 42016, 52520, 64640, 84032, 105040, 129280, 168064, 210080, 336128, 420160, 840320, 1680640]

約数ペア:

[(1, 1680640), (2, 840320), (4, 420160), (5, 336128), (8, 210080), (10, 168064), (13, 129280), (16, 105040), (20, 84032), (26, 64640), (32, 52520), (40, 42016), (52, 32320), (64, 26260), (65, 25856), (80, 21008), (101, 16640), (104, 16160), (128, 13130), (130, 12928), (160, 10504), (202, 8320), (208, 8080), (256, 6565), (260, 6464), (320, 5252), (404, 4160), (416, 4040), (505, 3328), (520, 3232), (640, 2626), (808, 2080), (832, 2020), (1010, 1664), (1040, 1616), (1280, 1313)]