21221440

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1$

素因数の和:164

約数の個数: 112

約数和(自身を含む): 55302912

約数和(自身を除く): 34081472

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 47, 64, 68, 80, 83, 85, 94, 136, 160, 166, 170, 188, 235, 272, 320, 332, 340, 376, 415, 470, 544, 664, 680, 752, 799, 830, 940, 1088, 1328, 1360, 1411, 1504, 1598, 1660, 1880, 2656, 2720, 2822, 3008, 3196, 3320, 3760, 3901, 3995, 5312, 5440, 5644, 6392, 6640, 7055, 7520, 7802, 7990, 11288, 12784, 13280, 14110, 15040, 15604, 15980, 19505, 22576, 25568, 26560, 28220, 31208, 31960, 39010, 45152, 51136, 56440, 62416, 63920, 66317, 78020, 90304, 112880, 124832, 127840, 132634, 156040, 225760, 249664, 255680, 265268, 312080, 331585, 451520, 530536, 624160, 663170, 1061072, 1248320, 1326340, 2122144, 2652680, 4244288, 5305360, 10610720, 21221440]

約数ペア:

[(1, 21221440), (2, 10610720), (4, 5305360), (5, 4244288), (8, 2652680), (10, 2122144), (16, 1326340), (17, 1248320), (20, 1061072), (32, 663170), (34, 624160), (40, 530536), (47, 451520), (64, 331585), (68, 312080), (80, 265268), (83, 255680), (85, 249664), (94, 225760), (136, 156040), (160, 132634), (166, 127840), (170, 124832), (188, 112880), (235, 90304), (272, 78020), (320, 66317), (332, 63920), (340, 62416), (376, 56440), (415, 51136), (470, 45152), (544, 39010), (664, 31960), (680, 31208), (752, 28220), (799, 26560), (830, 25568), (940, 22576), (1088, 19505), (1328, 15980), (1360, 15604), (1411, 15040), (1504, 14110), (1598, 13280), (1660, 12784), (1880, 11288), (2656, 7990), (2720, 7802), (2822, 7520), (3008, 7055), (3196, 6640), (3320, 6392), (3760, 5644), (3901, 5440), (3995, 5312)]