1998080

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{223}}^1$

素因数の和:251

約数の個数: 72

約数和(自身を含む): 5494272

約数和(自身を除く): 3496192

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 223, 224, 256, 280, 320, 446, 448, 560, 640, 892, 896, 1115, 1120, 1280, 1561, 1784, 1792, 2230, 2240, 3122, 3568, 4460, 4480, 6244, 7136, 7805, 8920, 8960, 12488, 14272, 15610, 17840, 24976, 28544, 31220, 35680, 49952, 57088, 62440, 71360, 99904, 124880, 142720, 199808, 249760, 285440, 399616, 499520, 999040, 1998080]

約数ペア:

[(1, 1998080), (2, 999040), (4, 499520), (5, 399616), (7, 285440), (8, 249760), (10, 199808), (14, 142720), (16, 124880), (20, 99904), (28, 71360), (32, 62440), (35, 57088), (40, 49952), (56, 35680), (64, 31220), (70, 28544), (80, 24976), (112, 17840), (128, 15610), (140, 14272), (160, 12488), (223, 8960), (224, 8920), (256, 7805), (280, 7136), (320, 6244), (446, 4480), (448, 4460), (560, 3568), (640, 3122), (892, 2240), (896, 2230), (1115, 1792), (1120, 1784), (1280, 1561)]