1644440

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{839}}^1$

素因数の和:864

約数の個数: 48

約数和(自身を含む): 4309200

約数和(自身を除く): 2664760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 839, 980, 1678, 1960, 3356, 4195, 5873, 6712, 8390, 11746, 16780, 23492, 29365, 33560, 41111, 46984, 58730, 82222, 117460, 164444, 205555, 234920, 328888, 411110, 822220, 1644440]

約数ペア:

[(1, 1644440), (2, 822220), (4, 411110), (5, 328888), (7, 234920), (8, 205555), (10, 164444), (14, 117460), (20, 82222), (28, 58730), (35, 46984), (40, 41111), (49, 33560), (56, 29365), (70, 23492), (98, 16780), (140, 11746), (196, 8390), (245, 6712), (280, 5873), (392, 4195), (490, 3356), (839, 1960), (980, 1678)]