18739980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{139}}^1$

素因数の和:268

約数の個数: 144

約数和(自身を含む): 66044160

約数和(自身を除く): 47304180

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 107, 126, 139, 140, 180, 210, 214, 252, 278, 315, 321, 417, 420, 428, 535, 556, 630, 642, 695, 749, 834, 963, 973, 1070, 1251, 1260, 1284, 1390, 1498, 1605, 1668, 1926, 1946, 2085, 2140, 2247, 2502, 2780, 2919, 2996, 3210, 3745, 3852, 3892, 4170, 4494, 4815, 4865, 5004, 5838, 6255, 6420, 6741, 7490, 8340, 8757, 8988, 9630, 9730, 11235, 11676, 12510, 13482, 14595, 14873, 14980, 17514, 19260, 19460, 22470, 25020, 26964, 29190, 29746, 33705, 35028, 43785, 44619, 44940, 58380, 59492, 67410, 74365, 87570, 89238, 104111, 133857, 134820, 148730, 175140, 178476, 208222, 223095, 267714, 297460, 312333, 416444, 446190, 520555, 535428, 624666, 669285, 892380, 936999, 1041110, 1249332, 1338570, 1561665, 1873998, 2082220, 2677140, 3123330, 3747996, 4684995, 6246660, 9369990, 18739980]

約数ペア:

[(1, 18739980), (2, 9369990), (3, 6246660), (4, 4684995), (5, 3747996), (6, 3123330), (7, 2677140), (9, 2082220), (10, 1873998), (12, 1561665), (14, 1338570), (15, 1249332), (18, 1041110), (20, 936999), (21, 892380), (28, 669285), (30, 624666), (35, 535428), (36, 520555), (42, 446190), (45, 416444), (60, 312333), (63, 297460), (70, 267714), (84, 223095), (90, 208222), (105, 178476), (107, 175140), (126, 148730), (139, 134820), (140, 133857), (180, 104111), (210, 89238), (214, 87570), (252, 74365), (278, 67410), (315, 59492), (321, 58380), (417, 44940), (420, 44619), (428, 43785), (535, 35028), (556, 33705), (630, 29746), (642, 29190), (695, 26964), (749, 25020), (834, 22470), (963, 19460), (973, 19260), (1070, 17514), (1251, 14980), (1260, 14873), (1284, 14595), (1390, 13482), (1498, 12510), (1605, 11676), (1668, 11235), (1926, 9730), (1946, 9630), (2085, 8988), (2140, 8757), (2247, 8340), (2502, 7490), (2780, 6741), (2919, 6420), (2996, 6255), (3210, 5838), (3745, 5004), (3852, 4865), (3892, 4815), (4170, 4494)]