19970860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{10973}}^1$

素因数の和:11002

約数の個数: 48

約数和(自身を含む): 51621696

約数和(自身を除く): 31650836

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 10973, 21946, 43892, 54865, 76811, 109730, 142649, 153622, 219460, 285298, 307244, 384055, 570596, 713245, 768110, 998543, 1426490, 1536220, 1997086, 2852980, 3994172, 4992715, 9985430, 19970860]

約数ペア:

[(1, 19970860), (2, 9985430), (4, 4992715), (5, 3994172), (7, 2852980), (10, 1997086), (13, 1536220), (14, 1426490), (20, 998543), (26, 768110), (28, 713245), (35, 570596), (52, 384055), (65, 307244), (70, 285298), (91, 219460), (130, 153622), (140, 142649), (182, 109730), (260, 76811), (364, 54865), (455, 43892), (910, 21946), (1820, 10973)]