20921457599

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{677}}^1\times {\mathrm{2687}}^1$

素因数の和:3455

約数の個数: 32

約数和(自身を含む): 25193742336

約数和(自身を除く): 4272284737

約数列:

[1, 7, 31, 53, 217, 371, 677, 1643, 2687, 4739, 11501, 18809, 20987, 35881, 83297, 142411, 146909, 251167, 583079, 996877, 1112311, 1819099, 4414741, 7786177, 12733693, 30903187, 56392069, 96412247, 394744483, 674885729, 2988779657, 20921457599]

約数ペア:

[(1, 20921457599), (7, 2988779657), (31, 674885729), (53, 394744483), (217, 96412247), (371, 56392069), (677, 30903187), (1643, 12733693), (2687, 7786177), (4739, 4414741), (11501, 1819099), (18809, 1112311), (20987, 996877), (35881, 583079), (83297, 251167), (142411, 146909)]