21004112

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:156

約数の個数: 80

約数和(自身を含む): 46282752

約数和(自身を除く): 25278640

約数列:

[1, 2, 4, 8, 16, 17, 31, 34, 47, 53, 62, 68, 94, 106, 124, 136, 188, 212, 248, 272, 376, 424, 496, 527, 752, 799, 848, 901, 1054, 1457, 1598, 1643, 1802, 2108, 2491, 2914, 3196, 3286, 3604, 4216, 4982, 5828, 6392, 6572, 7208, 8432, 9964, 11656, 12784, 13144, 14416, 19928, 23312, 24769, 26288, 27931, 39856, 42347, 49538, 55862, 77221, 84694, 99076, 111724, 154442, 169388, 198152, 223448, 308884, 338776, 396304, 446896, 617768, 677552, 1235536, 1312757, 2625514, 5251028, 10502056, 21004112]

約数ペア:

[(1, 21004112), (2, 10502056), (4, 5251028), (8, 2625514), (16, 1312757), (17, 1235536), (31, 677552), (34, 617768), (47, 446896), (53, 396304), (62, 338776), (68, 308884), (94, 223448), (106, 198152), (124, 169388), (136, 154442), (188, 111724), (212, 99076), (248, 84694), (272, 77221), (376, 55862), (424, 49538), (496, 42347), (527, 39856), (752, 27931), (799, 26288), (848, 24769), (901, 23312), (1054, 19928), (1457, 14416), (1598, 13144), (1643, 12784), (1802, 11656), (2108, 9964), (2491, 8432), (2914, 7208), (3196, 6572), (3286, 6392), (3604, 5828), (4216, 4982)]