21663616

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{277}}^1$

素因数の和:351

約数の個数: 64

約数和(自身を含む): 47638080

約数和(自身を除く): 25974464

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 47, 52, 64, 94, 104, 128, 188, 208, 277, 376, 416, 554, 611, 752, 832, 1108, 1222, 1504, 1664, 2216, 2444, 3008, 3601, 4432, 4888, 6016, 7202, 8864, 9776, 13019, 14404, 17728, 19552, 26038, 28808, 35456, 39104, 52076, 57616, 78208, 104152, 115232, 169247, 208304, 230464, 338494, 416608, 460928, 676988, 833216, 1353976, 1666432, 2707952, 5415904, 10831808, 21663616]

約数ペア:

[(1, 21663616), (2, 10831808), (4, 5415904), (8, 2707952), (13, 1666432), (16, 1353976), (26, 833216), (32, 676988), (47, 460928), (52, 416608), (64, 338494), (94, 230464), (104, 208304), (128, 169247), (188, 115232), (208, 104152), (277, 78208), (376, 57616), (416, 52076), (554, 39104), (611, 35456), (752, 28808), (832, 26038), (1108, 19552), (1222, 17728), (1504, 14404), (1664, 13019), (2216, 9776), (2444, 8864), (3008, 7202), (3601, 6016), (4432, 4888)]