21582080

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1297}}^1$

素因数の和:1331

約数の個数: 72

約数和(自身を含む): 55715352

約数和(自身を除く): 34133272

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 520, 640, 832, 1040, 1280, 1297, 1664, 2080, 2594, 3328, 4160, 5188, 6485, 8320, 10376, 12970, 16640, 16861, 20752, 25940, 33722, 41504, 51880, 67444, 83008, 84305, 103760, 134888, 166016, 168610, 207520, 269776, 332032, 337220, 415040, 539552, 674440, 830080, 1079104, 1348880, 1660160, 2158208, 2697760, 4316416, 5395520, 10791040, 21582080]

約数ペア:

[(1, 21582080), (2, 10791040), (4, 5395520), (5, 4316416), (8, 2697760), (10, 2158208), (13, 1660160), (16, 1348880), (20, 1079104), (26, 830080), (32, 674440), (40, 539552), (52, 415040), (64, 337220), (65, 332032), (80, 269776), (104, 207520), (128, 168610), (130, 166016), (160, 134888), (208, 103760), (256, 84305), (260, 83008), (320, 67444), (416, 51880), (520, 41504), (640, 33722), (832, 25940), (1040, 20752), (1280, 16861), (1297, 16640), (1664, 12970), (2080, 10376), (2594, 8320), (3328, 6485), (4160, 5188)]