20919780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16603}}^1$

素因数の和:16625

約数の個数: 72

約数和(自身を含む): 72526272

約数和(自身を除く): 51606492

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, 16603, 33206, 49809, 66412, 83015, 99618, 116221, 149427, 166030, 199236, 232442, 249045, 298854, 332060, 348663, 464884, 498090, 581105, 597708, 697326, 747135, 996180, 1045989, 1162210, 1394652, 1494270, 1743315, 2091978, 2324420, 2988540, 3486630, 4183956, 5229945, 6973260, 10459890, 20919780]

約数ペア:

[(1, 20919780), (2, 10459890), (3, 6973260), (4, 5229945), (5, 4183956), (6, 3486630), (7, 2988540), (9, 2324420), (10, 2091978), (12, 1743315), (14, 1494270), (15, 1394652), (18, 1162210), (20, 1045989), (21, 996180), (28, 747135), (30, 697326), (35, 597708), (36, 581105), (42, 498090), (45, 464884), (60, 348663), (63, 332060), (70, 298854), (84, 249045), (90, 232442), (105, 199236), (126, 166030), (140, 149427), (180, 116221), (210, 99618), (252, 83015), (315, 66412), (420, 49809), (630, 33206), (1260, 16603)]