21489904

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{41}}^2\times {\mathrm{47}}^1$

素因数の和:154

約数の個数: 60

約数和(自身を含む): 46148832

約数和(自身を除く): 24658928

約数列:

[1, 2, 4, 8, 16, 17, 34, 41, 47, 68, 82, 94, 136, 164, 188, 272, 328, 376, 656, 697, 752, 799, 1394, 1598, 1681, 1927, 2788, 3196, 3362, 3854, 5576, 6392, 6724, 7708, 11152, 12784, 13448, 15416, 26896, 28577, 30832, 32759, 57154, 65518, 79007, 114308, 131036, 158014, 228616, 262072, 316028, 457232, 524144, 632056, 1264112, 1343119, 2686238, 5372476, 10744952, 21489904]

約数ペア:

[(1, 21489904), (2, 10744952), (4, 5372476), (8, 2686238), (16, 1343119), (17, 1264112), (34, 632056), (41, 524144), (47, 457232), (68, 316028), (82, 262072), (94, 228616), (136, 158014), (164, 131036), (188, 114308), (272, 79007), (328, 65518), (376, 57154), (656, 32759), (697, 30832), (752, 28577), (799, 26896), (1394, 15416), (1598, 13448), (1681, 12784), (1927, 11152), (2788, 7708), (3196, 6724), (3362, 6392), (3854, 5576)]