20553540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{6991}}^1$

素因数の和:7017

約数の個数: 72

約数和(自身を含む): 66955392

約数和(自身を除く): 46401852

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 6991, 13982, 20973, 27964, 34955, 41946, 48937, 69910, 83892, 97874, 104865, 139820, 146811, 195748, 209730, 244685, 293622, 342559, 419460, 489370, 587244, 685118, 734055, 978740, 1027677, 1370236, 1468110, 1712795, 2055354, 2936220, 3425590, 4110708, 5138385, 6851180, 10276770, 20553540]

約数ペア:

[(1, 20553540), (2, 10276770), (3, 6851180), (4, 5138385), (5, 4110708), (6, 3425590), (7, 2936220), (10, 2055354), (12, 1712795), (14, 1468110), (15, 1370236), (20, 1027677), (21, 978740), (28, 734055), (30, 685118), (35, 587244), (42, 489370), (49, 419460), (60, 342559), (70, 293622), (84, 244685), (98, 209730), (105, 195748), (140, 146811), (147, 139820), (196, 104865), (210, 97874), (245, 83892), (294, 69910), (420, 48937), (490, 41946), (588, 34955), (735, 27964), (980, 20973), (1470, 13982), (2940, 6991)]