20854568

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{293}}^1$

素因数の和:378

約数の個数: 64

約数和(自身を含む): 47416320

約数和(自身を除く): 26561752

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 41, 56, 62, 82, 124, 164, 217, 248, 287, 293, 328, 434, 574, 586, 868, 1148, 1172, 1271, 1736, 2051, 2296, 2344, 2542, 4102, 5084, 8204, 8897, 9083, 10168, 12013, 16408, 17794, 18166, 24026, 35588, 36332, 48052, 63581, 71176, 72664, 84091, 96104, 127162, 168182, 254324, 336364, 372403, 508648, 672728, 744806, 1489612, 2606821, 2979224, 5213642, 10427284, 20854568]

約数ペア:

[(1, 20854568), (2, 10427284), (4, 5213642), (7, 2979224), (8, 2606821), (14, 1489612), (28, 744806), (31, 672728), (41, 508648), (56, 372403), (62, 336364), (82, 254324), (124, 168182), (164, 127162), (217, 96104), (248, 84091), (287, 72664), (293, 71176), (328, 63581), (434, 48052), (574, 36332), (586, 35588), (868, 24026), (1148, 18166), (1172, 17794), (1271, 16408), (1736, 12013), (2051, 10168), (2296, 9083), (2344, 8897), (2542, 8204), (4102, 5084)]