21305144

素因数分解:

$2^3\times 7^1\times {\mathrm{137}}^1\times {\mathrm{2777}}^1$

素因数の和:2927

約数の個数: 32

約数和(自身を含む): 46003680

約数和(自身を除く): 24698536

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 137, 274, 548, 959, 1096, 1918, 2777, 3836, 5554, 7672, 11108, 19439, 22216, 38878, 77756, 155512, 380449, 760898, 1521796, 2663143, 3043592, 5326286, 10652572, 21305144]

約数ペア:

[(1, 21305144), (2, 10652572), (4, 5326286), (7, 3043592), (8, 2663143), (14, 1521796), (28, 760898), (56, 380449), (137, 155512), (274, 77756), (548, 38878), (959, 22216), (1096, 19439), (1918, 11108), (2777, 7672), (3836, 5554)]