20423936

素因数分解:

$2^8\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2$

素因数の和:84

約数の個数: 108

約数和(自身を含む): 49062132

約数和(自身を除く): 28638196

約数列:

[1, 2, 4, 8, 13, 16, 17, 19, 26, 32, 34, 38, 52, 64, 68, 76, 104, 128, 136, 152, 208, 221, 247, 256, 272, 304, 323, 361, 416, 442, 494, 544, 608, 646, 722, 832, 884, 988, 1088, 1216, 1292, 1444, 1664, 1768, 1976, 2176, 2432, 2584, 2888, 3328, 3536, 3952, 4199, 4352, 4693, 4864, 5168, 5776, 6137, 7072, 7904, 8398, 9386, 10336, 11552, 12274, 14144, 15808, 16796, 18772, 20672, 23104, 24548, 28288, 31616, 33592, 37544, 41344, 46208, 49096, 56576, 63232, 67184, 75088, 79781, 82688, 92416, 98192, 134368, 150176, 159562, 196384, 268736, 300352, 319124, 392768, 537472, 600704, 638248, 785536, 1074944, 1201408, 1276496, 1571072, 2552992, 5105984, 10211968, 20423936]

約数ペア:

[(1, 20423936), (2, 10211968), (4, 5105984), (8, 2552992), (13, 1571072), (16, 1276496), (17, 1201408), (19, 1074944), (26, 785536), (32, 638248), (34, 600704), (38, 537472), (52, 392768), (64, 319124), (68, 300352), (76, 268736), (104, 196384), (128, 159562), (136, 150176), (152, 134368), (208, 98192), (221, 92416), (247, 82688), (256, 79781), (272, 75088), (304, 67184), (323, 63232), (361, 56576), (416, 49096), (442, 46208), (494, 41344), (544, 37544), (608, 33592), (646, 31616), (722, 28288), (832, 24548), (884, 23104), (988, 20672), (1088, 18772), (1216, 16796), (1292, 15808), (1444, 14144), (1664, 12274), (1768, 11552), (1976, 10336), (2176, 9386), (2432, 8398), (2584, 7904), (2888, 7072), (3328, 6137), (3536, 5776), (3952, 5168), (4199, 4864), (4352, 4693)]