2161840

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{443}}^1$

素因数の和:517

約数の個数: 40

約数和(自身を含む): 5120208

約数和(自身を除く): 2958368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 443, 488, 610, 886, 976, 1220, 1772, 2215, 2440, 3544, 4430, 4880, 7088, 8860, 17720, 27023, 35440, 54046, 108092, 135115, 216184, 270230, 432368, 540460, 1080920, 2161840]

約数ペア:

[(1, 2161840), (2, 1080920), (4, 540460), (5, 432368), (8, 270230), (10, 216184), (16, 135115), (20, 108092), (40, 54046), (61, 35440), (80, 27023), (122, 17720), (244, 8860), (305, 7088), (443, 4880), (488, 4430), (610, 3544), (886, 2440), (976, 2215), (1220, 1772)]