19996288

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:285

約数の個数: 64

約数和(自身を含む): 43825320

約数和(自身を除く): 23829032

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 61, 64, 104, 122, 128, 197, 208, 244, 394, 416, 488, 788, 793, 832, 976, 1576, 1586, 1664, 1952, 2561, 3152, 3172, 3904, 5122, 6304, 6344, 7808, 10244, 12017, 12608, 12688, 20488, 24034, 25216, 25376, 40976, 48068, 50752, 81952, 96136, 101504, 156221, 163904, 192272, 312442, 327808, 384544, 624884, 769088, 1249768, 1538176, 2499536, 4999072, 9998144, 19996288]

約数ペア:

[(1, 19996288), (2, 9998144), (4, 4999072), (8, 2499536), (13, 1538176), (16, 1249768), (26, 769088), (32, 624884), (52, 384544), (61, 327808), (64, 312442), (104, 192272), (122, 163904), (128, 156221), (197, 101504), (208, 96136), (244, 81952), (394, 50752), (416, 48068), (488, 40976), (788, 25376), (793, 25216), (832, 24034), (976, 20488), (1576, 12688), (1586, 12608), (1664, 12017), (1952, 10244), (2561, 7808), (3152, 6344), (3172, 6304), (3904, 5122)]