21921185

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:126

約数の個数: 64

約数和(自身を含む): 34062336

約数和(自身を除く): 12141151

約数列:

[1, 5, 11, 13, 23, 31, 43, 55, 65, 115, 143, 155, 215, 253, 299, 341, 403, 473, 559, 713, 715, 989, 1265, 1333, 1495, 1705, 2015, 2365, 2795, 3289, 3565, 4433, 4945, 6149, 6665, 7843, 9269, 10879, 12857, 14663, 16445, 17329, 22165, 30659, 30745, 39215, 46345, 54395, 64285, 73315, 86645, 101959, 141427, 153295, 190619, 337249, 398567, 509795, 707135, 953095, 1686245, 1992835, 4384237, 21921185]

約数ペア:

[(1, 21921185), (5, 4384237), (11, 1992835), (13, 1686245), (23, 953095), (31, 707135), (43, 509795), (55, 398567), (65, 337249), (115, 190619), (143, 153295), (155, 141427), (215, 101959), (253, 86645), (299, 73315), (341, 64285), (403, 54395), (473, 46345), (559, 39215), (713, 30745), (715, 30659), (989, 22165), (1265, 17329), (1333, 16445), (1495, 14663), (1705, 12857), (2015, 10879), (2365, 9269), (2795, 7843), (3289, 6665), (3565, 6149), (4433, 4945)]