20828014720

素因数分解:

$2^7\times 5^1\times {\mathrm{71}}^1\times {\mathrm{458363}}^1$

素因数の和:458453

約数の個数: 64

約数和(自身を含む): 50493378240

約数和(自身を除く): 29665363520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 128, 142, 160, 284, 320, 355, 568, 640, 710, 1136, 1420, 2272, 2840, 4544, 5680, 9088, 11360, 22720, 45440, 458363, 916726, 1833452, 2291815, 3666904, 4583630, 7333808, 9167260, 14667616, 18334520, 29335232, 32543773, 36669040, 58670464, 65087546, 73338080, 130175092, 146676160, 162718865, 260350184, 293352320, 325437730, 520700368, 650875460, 1041400736, 1301750920, 2082801472, 2603501840, 4165602944, 5207003680, 10414007360, 20828014720]

約数ペア:

[(1, 20828014720), (2, 10414007360), (4, 5207003680), (5, 4165602944), (8, 2603501840), (10, 2082801472), (16, 1301750920), (20, 1041400736), (32, 650875460), (40, 520700368), (64, 325437730), (71, 293352320), (80, 260350184), (128, 162718865), (142, 146676160), (160, 130175092), (284, 73338080), (320, 65087546), (355, 58670464), (568, 36669040), (640, 32543773), (710, 29335232), (1136, 18334520), (1420, 14667616), (2272, 9167260), (2840, 7333808), (4544, 4583630), (5680, 3666904), (9088, 2291815), (11360, 1833452), (22720, 916726), (45440, 458363)]