21415185

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1$

素因数の和:81

約数の個数: 120

約数和(自身を含む): 46347840

約数和(自身を除く): 24932655

約数列:

[1, 3, 5, 9, 11, 15, 19, 23, 27, 33, 45, 55, 57, 69, 81, 95, 99, 115, 121, 135, 165, 171, 207, 209, 253, 285, 297, 345, 363, 405, 437, 495, 513, 605, 621, 627, 759, 855, 891, 1035, 1045, 1089, 1265, 1311, 1485, 1539, 1815, 1863, 1881, 2185, 2277, 2299, 2565, 2783, 3105, 3135, 3267, 3795, 3933, 4455, 4807, 5445, 5643, 6555, 6831, 6897, 7695, 8349, 9315, 9405, 9801, 11385, 11495, 11799, 13915, 14421, 16335, 16929, 19665, 20493, 20691, 24035, 25047, 28215, 34155, 34485, 35397, 41745, 43263, 49005, 52877, 58995, 62073, 72105, 75141, 84645, 102465, 103455, 125235, 129789, 158631, 176985, 186219, 216315, 225423, 264385, 310365, 375705, 389367, 475893, 648945, 793155, 931095, 1127115, 1427679, 1946835, 2379465, 4283037, 7138395, 21415185]

約数ペア:

[(1, 21415185), (3, 7138395), (5, 4283037), (9, 2379465), (11, 1946835), (15, 1427679), (19, 1127115), (23, 931095), (27, 793155), (33, 648945), (45, 475893), (55, 389367), (57, 375705), (69, 310365), (81, 264385), (95, 225423), (99, 216315), (115, 186219), (121, 176985), (135, 158631), (165, 129789), (171, 125235), (207, 103455), (209, 102465), (253, 84645), (285, 75141), (297, 72105), (345, 62073), (363, 58995), (405, 52877), (437, 49005), (495, 43263), (513, 41745), (605, 35397), (621, 34485), (627, 34155), (759, 28215), (855, 25047), (891, 24035), (1035, 20691), (1045, 20493), (1089, 19665), (1265, 16929), (1311, 16335), (1485, 14421), (1539, 13915), (1815, 11799), (1863, 11495), (1881, 11385), (2185, 9801), (2277, 9405), (2299, 9315), (2565, 8349), (2783, 7695), (3105, 6897), (3135, 6831), (3267, 6555), (3795, 5643), (3933, 5445), (4455, 4807)]