99998720

素因数分解:

$2^{10}\times 5^1\times {\mathrm{19531}}^1$

素因数の和:19556

約数の個数: 44

約数和(自身を含む): 239892024

約数和(自身を除く): 139893304

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 5120, 19531, 39062, 78124, 97655, 156248, 195310, 312496, 390620, 624992, 781240, 1249984, 1562480, 2499968, 3124960, 4999936, 6249920, 9999872, 12499840, 19999744, 24999680, 49999360, 99998720]

約数ペア:

[(1, 99998720), (2, 49999360), (4, 24999680), (5, 19999744), (8, 12499840), (10, 9999872), (16, 6249920), (20, 4999936), (32, 3124960), (40, 2499968), (64, 1562480), (80, 1249984), (128, 781240), (160, 624992), (256, 390620), (320, 312496), (512, 195310), (640, 156248), (1024, 97655), (1280, 78124), (2560, 39062), (5120, 19531)]