21000279808

素因数分解:

$2^8\times {\mathrm{47}}^1\times {\mathrm{157}}^1\times {\mathrm{11117}}^1$

素因数の和:11337

約数の個数: 72

約数和(自身を含む): 43086964032

約数和(自身を除く): 22086684224

約数列:

[1, 2, 4, 8, 16, 32, 47, 64, 94, 128, 157, 188, 256, 314, 376, 628, 752, 1256, 1504, 2512, 3008, 5024, 6016, 7379, 10048, 11117, 12032, 14758, 20096, 22234, 29516, 40192, 44468, 59032, 88936, 118064, 177872, 236128, 355744, 472256, 522499, 711488, 944512, 1044998, 1422976, 1745369, 1889024, 2089996, 2845952, 3490738, 4179992, 6981476, 8359984, 13962952, 16719968, 27925904, 33439936, 55851808, 66879872, 82032343, 111703616, 133759744, 164064686, 223407232, 328129372, 446814464, 656258744, 1312517488, 2625034976, 5250069952, 10500139904, 21000279808]

約数ペア:

[(1, 21000279808), (2, 10500139904), (4, 5250069952), (8, 2625034976), (16, 1312517488), (32, 656258744), (47, 446814464), (64, 328129372), (94, 223407232), (128, 164064686), (157, 133759744), (188, 111703616), (256, 82032343), (314, 66879872), (376, 55851808), (628, 33439936), (752, 27925904), (1256, 16719968), (1504, 13962952), (2512, 8359984), (3008, 6981476), (5024, 4179992), (6016, 3490738), (7379, 2845952), (10048, 2089996), (11117, 1889024), (12032, 1745369), (14758, 1422976), (20096, 1044998), (22234, 944512), (29516, 711488), (40192, 522499), (44468, 472256), (59032, 355744), (88936, 236128), (118064, 177872)]