21720776

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{953}}^1$

素因数の和:1014

約数の個数: 64

約数和(自身を含む): 52202880

約数和(自身を除く): 30482104

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 37, 44, 56, 74, 77, 88, 148, 154, 259, 296, 308, 407, 518, 616, 814, 953, 1036, 1628, 1906, 2072, 2849, 3256, 3812, 5698, 6671, 7624, 10483, 11396, 13342, 20966, 22792, 26684, 35261, 41932, 53368, 70522, 73381, 83864, 141044, 146762, 246827, 282088, 293524, 387871, 493654, 587048, 775742, 987308, 1551484, 1974616, 2715097, 3102968, 5430194, 10860388, 21720776]

約数ペア:

[(1, 21720776), (2, 10860388), (4, 5430194), (7, 3102968), (8, 2715097), (11, 1974616), (14, 1551484), (22, 987308), (28, 775742), (37, 587048), (44, 493654), (56, 387871), (74, 293524), (77, 282088), (88, 246827), (148, 146762), (154, 141044), (259, 83864), (296, 73381), (308, 70522), (407, 53368), (518, 41932), (616, 35261), (814, 26684), (953, 22792), (1036, 20966), (1628, 13342), (1906, 11396), (2072, 10483), (2849, 7624), (3256, 6671), (3812, 5698)]