20398140

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16189}}^1$

素因数の和:16211

約数の個数: 72

約数和(自身を含む): 70717920

約数和(自身を除く): 50319780

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, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16189, 32378, 48567, 64756, 80945, 97134, 113323, 145701, 161890, 194268, 226646, 242835, 291402, 323780, 339969, 453292, 485670, 566615, 582804, 679938, 728505, 971340, 1019907, 1133230, 1359876, 1457010, 1699845, 2039814, 2266460, 2914020, 3399690, 4079628, 5099535, 6799380, 10199070, 20398140]

約数ペア:

[(1, 20398140), (2, 10199070), (3, 6799380), (4, 5099535), (5, 4079628), (6, 3399690), (7, 2914020), (9, 2266460), (10, 2039814), (12, 1699845), (14, 1457010), (15, 1359876), (18, 1133230), (20, 1019907), (21, 971340), (28, 728505), (30, 679938), (35, 582804), (36, 566615), (42, 485670), (45, 453292), (60, 339969), (63, 323780), (70, 291402), (84, 242835), (90, 226646), (105, 194268), (126, 161890), (140, 145701), (180, 113323), (210, 97134), (252, 80945), (315, 64756), (420, 48567), (630, 32378), (1260, 16189)]