21258016

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{373}}^1$

素因数の和:533

約数の個数: 48

約数和(自身を含む): 45521784

約数和(自身を除く): 24263768

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 137, 208, 274, 373, 416, 548, 746, 1096, 1492, 1781, 2192, 2984, 3562, 4384, 4849, 5968, 7124, 9698, 11936, 14248, 19396, 28496, 38792, 51101, 56992, 77584, 102202, 155168, 204404, 408808, 664313, 817616, 1328626, 1635232, 2657252, 5314504, 10629008, 21258016]

約数ペア:

[(1, 21258016), (2, 10629008), (4, 5314504), (8, 2657252), (13, 1635232), (16, 1328626), (26, 817616), (32, 664313), (52, 408808), (104, 204404), (137, 155168), (208, 102202), (274, 77584), (373, 56992), (416, 51101), (548, 38792), (746, 28496), (1096, 19396), (1492, 14248), (1781, 11936), (2192, 9698), (2984, 7124), (3562, 5968), (4384, 4849)]