199910020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{257}}^1$

素因数の和:397

約数の個数: 96

約数和(自身を含む): 468115200

約数和(自身を除く): 268205180

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 76, 89, 92, 95, 115, 178, 190, 230, 257, 356, 380, 437, 445, 460, 514, 874, 890, 1028, 1285, 1691, 1748, 1780, 2047, 2185, 2570, 3382, 4094, 4370, 4883, 5140, 5911, 6764, 8188, 8455, 8740, 9766, 10235, 11822, 16910, 19532, 20470, 22873, 23644, 24415, 29555, 33820, 38893, 40940, 45746, 48830, 59110, 77786, 91492, 97660, 112309, 114365, 118220, 155572, 194465, 224618, 228730, 388930, 434587, 449236, 457460, 526079, 561545, 777860, 869174, 1052158, 1123090, 1738348, 2104316, 2172935, 2246180, 2630395, 4345870, 5260790, 8691740, 9995501, 10521580, 19991002, 39982004, 49977505, 99955010, 199910020]

約数ペア:

[(1, 199910020), (2, 99955010), (4, 49977505), (5, 39982004), (10, 19991002), (19, 10521580), (20, 9995501), (23, 8691740), (38, 5260790), (46, 4345870), (76, 2630395), (89, 2246180), (92, 2172935), (95, 2104316), (115, 1738348), (178, 1123090), (190, 1052158), (230, 869174), (257, 777860), (356, 561545), (380, 526079), (437, 457460), (445, 449236), (460, 434587), (514, 388930), (874, 228730), (890, 224618), (1028, 194465), (1285, 155572), (1691, 118220), (1748, 114365), (1780, 112309), (2047, 97660), (2185, 91492), (2570, 77786), (3382, 59110), (4094, 48830), (4370, 45746), (4883, 40940), (5140, 38893), (5911, 33820), (6764, 29555), (8188, 24415), (8455, 23644), (8740, 22873), (9766, 20470), (10235, 19532), (11822, 16910)]