18985995

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{181}}^1$

素因数の和:242

約数の個数: 80

約数和(自身を含む): 40168128

約数和(自身を除く): 21182133

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 37, 45, 63, 81, 105, 111, 135, 181, 185, 189, 259, 315, 333, 405, 543, 555, 567, 777, 905, 945, 999, 1267, 1295, 1629, 1665, 2331, 2715, 2835, 2997, 3801, 3885, 4887, 4995, 6335, 6697, 6993, 8145, 11403, 11655, 14661, 14985, 19005, 20091, 20979, 24435, 33485, 34209, 34965, 46879, 57015, 60273, 73305, 100455, 102627, 104895, 140637, 171045, 180819, 234395, 301365, 421911, 513135, 542457, 703185, 904095, 1265733, 2109555, 2712285, 3797199, 6328665, 18985995]

約数ペア:

[(1, 18985995), (3, 6328665), (5, 3797199), (7, 2712285), (9, 2109555), (15, 1265733), (21, 904095), (27, 703185), (35, 542457), (37, 513135), (45, 421911), (63, 301365), (81, 234395), (105, 180819), (111, 171045), (135, 140637), (181, 104895), (185, 102627), (189, 100455), (259, 73305), (315, 60273), (333, 57015), (405, 46879), (543, 34965), (555, 34209), (567, 33485), (777, 24435), (905, 20979), (945, 20091), (999, 19005), (1267, 14985), (1295, 14661), (1629, 11655), (1665, 11403), (2331, 8145), (2715, 6993), (2835, 6697), (2997, 6335), (3801, 4995), (3885, 4887)]