1640648720

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{280933}}^1$

素因数の和:281019

約数の個数: 40

約数和(自身を含む): 3866775576

約数和(自身を除く): 2226126856

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 146, 292, 365, 584, 730, 1168, 1460, 2920, 5840, 280933, 561866, 1123732, 1404665, 2247464, 2809330, 4494928, 5618660, 11237320, 20508109, 22474640, 41016218, 82032436, 102540545, 164064872, 205081090, 328129744, 410162180, 820324360, 1640648720]

約数ペア:

[(1, 1640648720), (2, 820324360), (4, 410162180), (5, 328129744), (8, 205081090), (10, 164064872), (16, 102540545), (20, 82032436), (40, 41016218), (73, 22474640), (80, 20508109), (146, 11237320), (292, 5618660), (365, 4494928), (584, 2809330), (730, 2247464), (1168, 1404665), (1460, 1123732), (2920, 561866), (5840, 280933)]