19942884

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{991}}^1$

素因数の和:1057

約数の個数: 72

約数和(自身を含む): 55607552

約数和(自身を除く): 35664668

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 43, 52, 78, 86, 117, 129, 156, 172, 234, 258, 387, 468, 516, 559, 774, 991, 1118, 1548, 1677, 1982, 2236, 2973, 3354, 3964, 5031, 5946, 6708, 8919, 10062, 11892, 12883, 17838, 20124, 25766, 35676, 38649, 42613, 51532, 77298, 85226, 115947, 127839, 154596, 170452, 231894, 255678, 383517, 463788, 511356, 553969, 767034, 1107938, 1534068, 1661907, 2215876, 3323814, 4985721, 6647628, 9971442, 19942884]

約数ペア:

[(1, 19942884), (2, 9971442), (3, 6647628), (4, 4985721), (6, 3323814), (9, 2215876), (12, 1661907), (13, 1534068), (18, 1107938), (26, 767034), (36, 553969), (39, 511356), (43, 463788), (52, 383517), (78, 255678), (86, 231894), (117, 170452), (129, 154596), (156, 127839), (172, 115947), (234, 85226), (258, 77298), (387, 51532), (468, 42613), (516, 38649), (559, 35676), (774, 25766), (991, 20124), (1118, 17838), (1548, 12883), (1677, 11892), (1982, 10062), (2236, 8919), (2973, 6708), (3354, 5946), (3964, 5031)]