21865168

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3391}}^1$

素因数の和:3443

約数の個数: 40

約数和(自身を含む): 47108096

約数和(自身を除く): 25242928

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 124, 208, 248, 403, 496, 806, 1612, 3224, 3391, 6448, 6782, 13564, 27128, 44083, 54256, 88166, 105121, 176332, 210242, 352664, 420484, 705328, 840968, 1366573, 1681936, 2733146, 5466292, 10932584, 21865168]

約数ペア:

[(1, 21865168), (2, 10932584), (4, 5466292), (8, 2733146), (13, 1681936), (16, 1366573), (26, 840968), (31, 705328), (52, 420484), (62, 352664), (104, 210242), (124, 176332), (208, 105121), (248, 88166), (403, 54256), (496, 44083), (806, 27128), (1612, 13564), (3224, 6782), (3391, 6448)]