20897968

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{463}}^1$

素因数の和:522

約数の個数: 80

約数和(自身を含む): 51552256

約数和(自身を除く): 30654288

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 31, 52, 56, 62, 91, 104, 112, 124, 182, 208, 217, 248, 364, 403, 434, 463, 496, 728, 806, 868, 926, 1456, 1612, 1736, 1852, 2821, 3224, 3241, 3472, 3704, 5642, 6019, 6448, 6482, 7408, 11284, 12038, 12964, 14353, 22568, 24076, 25928, 28706, 42133, 45136, 48152, 51856, 57412, 84266, 96304, 100471, 114824, 168532, 186589, 200942, 229648, 337064, 373178, 401884, 674128, 746356, 803768, 1306123, 1492712, 1607536, 2612246, 2985424, 5224492, 10448984, 20897968]

約数ペア:

[(1, 20897968), (2, 10448984), (4, 5224492), (7, 2985424), (8, 2612246), (13, 1607536), (14, 1492712), (16, 1306123), (26, 803768), (28, 746356), (31, 674128), (52, 401884), (56, 373178), (62, 337064), (91, 229648), (104, 200942), (112, 186589), (124, 168532), (182, 114824), (208, 100471), (217, 96304), (248, 84266), (364, 57412), (403, 51856), (434, 48152), (463, 45136), (496, 42133), (728, 28706), (806, 25928), (868, 24076), (926, 22568), (1456, 14353), (1612, 12964), (1736, 12038), (1852, 11284), (2821, 7408), (3224, 6482), (3241, 6448), (3472, 6019), (3704, 5642)]