18900525

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:203

約数の個数: 72

約数和(自身を含む): 37601760

約数和(自身を除く): 18701235

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 37, 49, 75, 105, 111, 139, 147, 175, 185, 245, 259, 417, 525, 555, 695, 735, 777, 925, 973, 1225, 1295, 1813, 2085, 2775, 2919, 3475, 3675, 3885, 4865, 5143, 5439, 6475, 6811, 9065, 10425, 14595, 15429, 19425, 20433, 24325, 25715, 27195, 34055, 36001, 45325, 72975, 77145, 102165, 108003, 128575, 135975, 170275, 180005, 252007, 385725, 510825, 540015, 756021, 900025, 1260035, 2700075, 3780105, 6300175, 18900525]

約数ペア:

[(1, 18900525), (3, 6300175), (5, 3780105), (7, 2700075), (15, 1260035), (21, 900025), (25, 756021), (35, 540015), (37, 510825), (49, 385725), (75, 252007), (105, 180005), (111, 170275), (139, 135975), (147, 128575), (175, 108003), (185, 102165), (245, 77145), (259, 72975), (417, 45325), (525, 36001), (555, 34055), (695, 27195), (735, 25715), (777, 24325), (925, 20433), (973, 19425), (1225, 15429), (1295, 14595), (1813, 10425), (2085, 9065), (2775, 6811), (2919, 6475), (3475, 5439), (3675, 5143), (3885, 4865)]